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P A L E O N T O L O G I C A L R E S O U R C E S A S S E S SME N T RANCHO VISTA VILLAGE (PA12-0033/3004) CITY OF TEMECULA RIVERSIDE COUNTY, CALIFORNIA August 2012
P A L E O N T O L O G I C A L R E S O U R C E S A S S E S SME N T RANCHO VISTA VILLAGE (PA12-0033/3004) CITY OF TEMECULA RIVERSIDE COUNTY, CALIFORNIA Prepared for: City of Temecula Attn:
Stuart Fisk 41000 Main Street Temecula, California 92590 Prepared by: Brooks Smith and Frederick W Lange LSA Associates, Inc. 1500 Iowa Avenue, Suite 200 Riverside, California 92507
LSA Project No. TMU1201 August 2012
L S A A S S O C I A T E S , I N C . P A L E O N T O L O G I C A L R E S O U R C E S A S S E S SME N T A U G U S T 2 0 1 2 RANCHO VISTA VILLAGE ( P A 1 2 -0 0 3 3 /3 0 0 4 ) T EME C U
L A , C A L I F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\Project (2).docx «11/30/2012» i TABLE OF CONTENTS MANAGEMENT
SUMMARY.............................................................................................................. 2 INTRODUCTION ..................................................................
............................................................... 2 Purpose of Investigation ............................................................................................................
...... 2 Project Location and Description ..................................................................................................... 2 NATURAL SETTING .....................................
................. ERROR! BOOKMARK NOT DEFINED. Biology ............................................................................................ Error! Bookmark not defined. GEOLOGY
AND PALEONTOLOGY .................................................................................................. 4 Geologic Setting ................................................................
.............................................................. 4 Geology ..............................................................................................................................
............. 4 Paleontological Setting .................................................................................................................... 7 Paleontology ...........................
........................................................ Error! Bookmark not defined. PERSONNEL .......................................................................................................
................................. 7 METHODS ............................................................................................................................................
8 RESULTS .......................................................................... ERROR! BOOKMARK NOT DEFINED. PALEONTOLOGICAL RESOURCE RECOMMENDATIONSERROR! BOOKMARK NOT DEFINED.
Paleontological Resource Impact Mitigation Program ................... Error! Bookmark not defined. BIBLIOGRAPHY ......................................................................................
......................................... 11 FIGURES Figure 1: Project Vicinity and Location .................................................................................................
3 Figure 2: Geology Map .......................................................................................................................... 6 Figure 3: Project Views ..........................
................................................................................................ 9
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L A , C A L I F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\ Project (2).docx «11/30/2012» 2 MANAGEMENT SUMMARY LSA
Associates, Inc. (LSA) was retained by the City of Temecula to conduct a paleontological resources assessment of the Project (PA12-0033/3004)
in the City of Temecula, Riverside County, California. A paleontological locality search and literature review was conducted for the subject property in July 2012 and an archaeological
and paleontological field survey of the project site was subsequently completed that same month. The field assessment was completed pursuant to the California Environmental Quality Act
(CEQA). The paleontological locality search indicates that the Pauba Formation underlies the parcel and has a high potential to contain significant, nonrenewable paleontological resources.
The field survey confirmed the presence of sediments consistent with the description of the Pauba Formation. Construction excavation may adversely affect these resources and, consequently,
a paleontological resource mitigation and monitoring plan (PRMMP) is recommended. INTRODUCTION LSA was retained by the City of Temecula to conduct a paleontological resources study to
assess the environmental effects of the proposed development of the Rancho Vista Village project at the northeast corner of the intersection of Rancho Vista Road and Mira Loma Road (Figure
1). In July 2012, LSA requested a paleontological locality search and literature review from the Division of Geological Sciences at the San Bernardino County Museum (SBCM). A field assessment
for the parcel was completed the same month. Purpose of Investigation The paleontological resources assessment was conducted according to CEQA, Public Resources Code (13 PRC) 2100, ((14
CAC) 15000, Appendix G, Section J, (PRC) 2100-21177, Appendix G, (PRC) 5097.5. The paleontological resources assessment was conducted to evaluate the potential existence of resources
that would require a preparation of a PRMMP that would reduce impacts to a level less than significant. Project Location and Description The project is located within the unsectioned
southeastern quadrant of Section 1 (projected) of Township 8 South, Range 3 West, San Bernardino Baseline and Meridian, as shown on the U.S. Geological Survey (USGS) Temecula, California
(1975) and Murrieta, California (1979) 7.5-minute topographic quadrangles (USGS, photorevised 1979). The surface of the parcel has been disturbed by school construction, dumping and
weed abatement activities.
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A , C A L I F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\ Project (2).docx «11/30/2012» 3 Figure 1: Project Vicinity
and Location
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Paleontological resources, or fossils, are the remains (such as bones, teeth, shells, leaves, or wood) and/or traces (such as tracks or burrows) of prehistoric life. Generally, for something
to be considered a fossil it must be at least 10,000 years old, although the Society for Vertebrate Paleontology (SVP; 1995, 2010) sometimes considers anything more than 5,000 years
old to be a fossil. Fossils provide evidence of ancient organisms and can document the patterns of organic evolution and extinction. In California, impacts to paleontological resources
are addressed through the environmental review process pursuant to CEQA. In order to determine whether paleontological resources will be affected, geologic maps are examined, and research
is undertaken to determine if paleontological resources have been found in the same or similar sediments to those that outcrop within the project area. Geologic Setting The Rancho Vista
Village Project is located within the northern end of the Peninsular Range Province of Southern California (California Geological Survey, 2002). The Peninsular Range Geomorphic Province
is a 900-mile (mi) long northwest-southeast-trending structural block that extends from the tip of Baja California to the Transverse Ranges and includes the Los Angeles Basin (Norris
and Webb, 1976). The total width of the province is approximately 225 mi, with a maximum landbound width of 65 mi (Sharp, 1976). It contains extensive pre-Cretaceous (> 65 million years
ago) igneous and metamorphic rocks covered by limited exposures of post-Cretaceous sedimentary deposits. Belyea and Minch (1989) report that the Santa Ana Mountains contain exposures
of the most complete section of Late Mesozoic and Cenozoic (approximately 150 million years ago to the present) stratigraphy in the entire Peninsular Ranges. The project is located on
the western boundary of the Perris Block in an area known as the Elsinore Trough. The Elsinore Trough contains exposures of the very fossiliferous Pauba Formation and the Unnamed Sandstone
(Kennedy, 1977). These sediments range in age from Pliocene (4 million years) to mid-Pleistocene (300,000 years). The Unnamed Sandstone has produced vertebrate fossils in Murrieta that
suggest a time range spanning the Pliocene period (4 million to 2 million years). The Pauba Formation contains Pleistocene fossils, but none from the Rancholabrean Land North American
Land Mammal Age (NALMA) (200,000 to ~10,000 years ago). Since the Pauba Formation contains the Bishop Ash (758,000 years), it at least spans the period between 240,000 and 800,000 years.
Late Pleistocene alluvium post-dates the Pauba Formation and correlates with sediments found in northern Murrieta, French Valley, and the Diamond Valley Reservoir near Hemet, which have
been dated at around 150,000 to 41,500 years based on fossil remains and radiometric dating techniques (Reynolds and Reynolds, 1991; Reynolds, 2001, 2002a, 2002b, 2004; and Springer
and others, 1999). Figure 2 depicts the geology of the project and surrounding area as mapped by Morton and Kennedy (2003) and a brief description of the geologic units that may be encountered
within the project area is provided below. It should be noted that the geology map does not include the limits of any artificial fill. Geology The Rancho Vista parcel is northeast of
the Wildomar Fault Zone, with the Santa Ana Mountains on the south and the Perris Plain to the northeast (Rogers, 1965). The parcels sit on sediments referred to as the Pauba Formation
that overlies Cretaceous gabbro (Mann, 1955; Kennedy, 1976; Reynolds and others,
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A , C A L I F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\Project (2).docx «11/30/2012» 5 1991). The higher ridge
tops of the parcel appears to be capped by the Older Pleistocene Alluvium (Mann, 1955; Kennedy, 1977; Reynolds and others, 1991). Previous geologic mapping of the Murrieta region (Rogers,
1965, Kennedy, 1977, Kennedy and Morton, 2003) indicates that the proposed project area is located upon surface exposures of the Sandstone Member of the Pauba Formation (unit Qpfs),
incised by a thin veneer of Holocene or recent alluvium (Qya). The Holocene alluvium is geologically too young to have potential to contain significant fossils and so is assigned low
paleontological sensitivity. In contrast, the Sandstone Member of the Pauba Formation is highly fossiliferous throughout its areal exposure, and is therefore assigned a high paleontological
sensitivity. Vertebrate fossils recovered from the Sandstone Member of this Formation include mammoths, mastodons, ground sloths, saber-toothed cats, tapirs, horses, camels, and llamas,
along with abundant small vertebrates and invertebrates (Reynolds and others, 1991; Pajak and others, 1996). The fossiliferous Pauba Formation unconformably overlies the Temecula Arkose
and an Unnamed Sandstone and conglomerate formation, and has been dated (Mann, 1955; Pajak and others, 1996) to the middle Pleistocene Epoch on the basis of its stratigraphic position
and the vertebrate fossils recovered from the Formation. Pauba Formation. The Pauba Formation was named by Mann (1955) for exposures of in the Rancho Pauba area approximately 2 mi southeast
of Temecula. This formation was deposited during the Early to Middle Pleistocene and consists of terrestrial alluvial stream deposits composed of interbedded siltstone, sandstone, and
conglomerate. The Pauba Formation date from late Irvingtonian and early Rancholabrean ages (Morton and Kennedy, 2003), but the age of these sediments may be restricted to being no younger
than the Irvingtonian (see paleontology discussion below). The Pauba Formation includes two informal members: an upper Sandstone Member consisting of brown, moderately well-indurated,
cross-bedded sandstone with sparse cobble to boulder conglomerate interbeds; and a lower Fanglomerate Member (Qpf) consisting of grayish brown, well-indurated, poorly sorted fanglomerate
and mudstone. Only the upper sandstone member is exposed near the project and has a possibility of being encountered during project-related excavation
L S A A S S O C I A T E S , I N C . P A L E O N T O L O G I C A L R E S O U R C E S A S S E S SME N T A U G U S T 2 0 1 2 RANCHO VISTA VILLAGE ( P A 1 2 -0 0 3 3 /3 0 0 4 T EME C U L
A , C A L I F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\ Project (2).docx «11/30/2012» 6 Figure 2: Geology Map
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The Elsinore Trough contains the very fossiliferous Pauba Formation and the Unnamed Sandstone (Kennedy, 1977). These sediments range in age from Pliocene (4 million years) to mid-Pleistocene
(300,000 years). The Unnamed Sandstone has produced vertebrate fossils in the Temecula area that suggest a time range spanning the Pliocene period (4 million to 2 million years). The
Pauba Formation contains Pleistocene fossils, but none that represent the Rancholabrean NALMA (less than 300,000 years). Since the Pauba Formation contains the Bishop Ash (758,000 years),
it at least spans the period between 200,000 and 800,000 years, and the fossil mammals that it it contains represent the Irvingtonian NALMA. The literature review indicated that more
than 400 paleontological localities are known from the Pauba Formation and the Unnamed Sandstone in the vicinity of Temecula (Reynolds and others, 1991), 10 of which are situated within
1-mile of the Rancho Vista project. Large fossil mammals known from the area include horse, camel, deer, ground sloth, bear, coyote, mastodon, and mammoth. Small fossils include birds,
reptiles, amphibians, fish, and mollusks, as well as a large number of species of rodents that assist in providing temporal constraints for deposition of the sediments (Reynolds and
others, 1991). A list of 67 taxa including large and small fossil species has been presented in several summaries (Golz and others, 1977; Reynolds and others, 1991; Reynolds and Reynolds,
1991). The fossil taxa from the Unnamed Sandstone include certain species restricted to the Blancan NALMA. These include the extinct rodents Mimomys parvus, a vole; Paraneotoma fossilis,
a woodrat; and Sigmodon spp., two species of cotton rat. The mammalian fossils from the Pauba Formation (spanning >200,000B800,000 years) includes species of mammoth, the indicator fossil
for the Pleistocene period, but not the remains of bison, the indicator species for the latest Pleistocene Rancholabrean NALMA. The Pauba Formation also includes fossils of mastodon,
the woodrat Neotoma (Paraneotoma, and the cricetid Sigmodon are absent), and the vole Microtus californicus (Mimmomys is absent), suggesting a Irvingtonian NALMA for the deposition of
these sediments in the Elsinore trough. The Older Pleistocene Alluvium on the parcel sits unconformably on, and thus post-dates the mid-Pleistocene Pauba Formations. It possibly correlates
with the fossiliferous sediments found in French Valley (Reynolds, 2001, 2002) and at the Diamond Valley Reservoir near Hemet (Springer and others, 1999), since these late Pleistocene
sediments are at elevations of approximately 1,300 feet or higher. In addition to the wealth of fossils recovered at Diamond Valley, the sediments are known to contain bison, the Rancholabrean
NALMA indicator, and have also been dated at 40,000 years (Springer and others, 1999). The Late Pleistocene sediments in French Valley contain antelope, horse, llama, and deer. The presence
of these herbivores, as well as rabbit, woodrat, kangaroo rat, and toad, suggest that the available habitat was mixed grassland, parkland, and dense scrub or chaparral around a marshland.
PERSONNEL Brooks Smith, LSA project manager, conducted the paleontological resource literature review and assisted with report writing. Dr. Frederick Lange conducted the field survey
and confirmed the sediments mapped by Kennedy and Morton (2003) and assisted in the preparation of the report.
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F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\Project (2).docx «11/30/2012» 8 METHODS The paleontological resources
literature review was conducted using available references to identify sedimentary formations with paleontological resource sensitivity and fossil localities within the vicinity of the
project parcels in the Elsinore Trough of southwestern Riverside County. The intensive foot-survey of the project for cultural and paleontological resources was conducted in July 2012.
The survey was conducted by walking parallel transects spaced approximately 10 meters apart. Soil profiles were examined for cultural and paleontological stratigraphy and rodent back
dirt was checked for cultural and fossil remains. Figure 3 contains photographs of the project site. RESULTS Mr. Eric Scott, Curator of Paleontology in the Division of Geological Sciences
at the SBCM, conducted a search of the Regional Paleontologic Locality Inventory (RPLI) housed at the SBCM. The locality search indicated that more than 400 paleontological resource
localities are known from fossiliferous sediments in the Temecula area (Reynolds and others, 1991). Vertebrate fossils from the Elsinore trough have been used to determine the Pliocene
age of the Temecula Arkose, the Unnamed Sandstone, and the Pleistocene age of the Pauba Formation (Mann, 1955; Kennedy, 1977; Reynolds and others, 1991). Large fossil mammals known from
the area include horse, camel, sloth, and mammoth. A list of 67 taxa including large and small fossil species has been presented in several summaries (Golz and others, 1977; Reynolds
and others, 1991; Reynolds and Reynolds 1991). Mr. Scott indicated that the results of the record search indicated that no previously-known paleontologic localities are recorded within
the boundaries of the proposed project property. He did note, however, that 7 resource localities (SBCM 5.6.94 to 5.6.100) are recorded from within ¼ mile to the north of the proposed
project area. He noted that these localities were recorded from surface and subsurface exposures of the Sandstone Member of the Pauba Formation. Additionally, localities SBCM 5.6.209
through 5.6.211 are situated approximately 1 mile to the northeast of the proposed project area. All of these localities yielded significant nonrenewable paleontologic resources from
surface and subsurface sediments of the Sandstone Member of the Pauba Formation. The project has been graded and has had stone fill materials deposited on it. Ground visibility was approximately
20 percent with a cover of matted, dry grasses (Figures 3a and 3b). The area of a former school on the northern end of the property was also inspected with negative results. No paleontological
resources were observed during the field survey, but the sediments observed within the parcel confirmed the geology as mapped by Kennedy and Morton (2003).
L S A A S S O C I A T E S , I N C . P A L E O N T O L O G I C A L R E S O U R C E S A S S E S SME N T A U G U S T 2 0 1 2 RANCHO VISTA VILLAGE(PA12-0033/3004 T EME C U L A , C A L I
F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\Project (2).docx «11/30/2012» 9 Figure 3: Project Views
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F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\Project (2).docx «11/30/2012» 10 PALEONTOLOGICAL RESOURCE RECOMMENDATIONS
The abundance of fossils from the proposed project area, as well as from the other 400 fossil localities mapped from the Pauba Formation, demonstrate the high paleontological sensitivity
of the region. The presence of sediments suitable to contain paleontological resources and the positive results of the literature review reinforce the high potential for encountering
significant nonrenewable vertebrate fossils on the proposed project. This study recommends that a PRMMP be included with construction excavation. A PRMMP identifies paleontologically
sensitive areas within the project area, the organization and responsibilities of the monitors, procedures to be implemented if paleontological resources are encountered during the project,
the treatment (recovery, preparation, identification, analysis and curation of any collected resources), and a compliance report. It is recommended that a professional paleontologist
be hired to oversee paleontological monitoring following a PRMMP. At a minimum, the PRMMP should include: • A trained paleontological monitor will be present during ground-disturbing
activities within the project area in sediments determined likely to contain paleontological resources. The monitoring for paleontological resources will be conducted on a full-time
basis. The monitor will be empowered to temporarily halt or redirect construction activities to ensure avoidance of adverse impacts to paleontological resources. The monitor will be
equipped to rapidly remove any large fossil specimens encountered during excavation. During monitoring, samples will be collected and processed to recover microvertebrate fossils. Processing
will include wet screen washing and microscopic examination of the residual materials to identify small vertebrate remains. The project paleontologist may reevaluate the monitoring program
after 50 percent of the excavation has been completed. • Upon encountering a large deposit of bone, salvage of all bone in the area will be conducted with additional field staff and
in accordance with modern paleontological techniques. • All fossils collected during the project will be prepared to a reasonable point of identification. Excess sediment or matrix will
be removed from the specimens to reduce the bulk and cost of storage. Itemized catalogs of all material collected and identified will be provided to the museum repository along with
the specimens. • A report documenting the results of the monitoring and salvage activities and the significance of the fossils will be prepared. • All fossils collected during this work,
along with the itemized inventory of these specimens, will be deposited in a museum repository for permanent curation and storage. Compliance with these recommendations will ensure that
excavation impacts to the paleontological resources are maintained below a level of significance.
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F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\Project (2).docx «11/30/2012» 11 BIBLIOGRAPHY Belyea, R.B., J.A. Minch
1989 Stratigraphy and Depositional Environments of the Sespe Formation, Northern Santa Ana Mountains, California in Field Geology in Orange County, Southern California. NAGT-FWS Field
Guidebook, 1994. Bortugno, E.J., and T.E. Spittler 1986 Geologic Map of the San Bernardino Quadrangle, California. 1:250,000. California Division of Mines and Geology. California Geological
Survey 2002 California Geomorphic Provinces. California Geologic Survey Note 36. California Department of Conservation. County of Riverside 2008 General Plan of the County of Riverside.
Available on-line at: http://www.rctlma.org/genplan_general_plan_2008/general_plan_2008.aspx. Accessed July 2012. Golz, D. J., G.T. Jefferson, and M.P. Kennedy 1977 Late Pleistocene
Vertebrate fossils from the Elsinore Fault Zone, California. J. Paleo. 51(4):864-866. Jaeger, Edmund C., and Arthur C. Smith, 1971 Introduction to the Natural History of Southern California.
California Natural History Guides: 13. Los Angeles: University of California Press. Kennedy, M.P. 1977 Recency and Character of Faulting along the Elsinore Fault Zone in Southern Riverside
County, California. California Division of Mines and Geology Special Report 131, 12 pp. Kenney, Miles D. 1999 Emplacement, Offset History, and Recent Uplift of Basement within the San
Andreas Fault System, Northeastern San Gabriel Mountains; University of Oregon. Mann, J.F. 1955 Geology of a portion of the Elsinore fault zone, California. California Division of Mines
and Geology Special Report 43, 22 pp. Morton, D.M., and M.P. Kennedy 2003 Geologic Map of the Bachelor Mountain 7.5' Quadrangle, Riverside County, California. Version 1.0. Geologic Mapping
by D.M. Morton and M.P. Kennedy, digital preparation by Kelly R. Bovard and Diane Burns. Prepared by the U.S. Geological Survey, Menlo Park, California, in cooperation with the California
Geological Survey. U.S. Geological Survey Open File Report 03-103. Map Scale 1:24,000.
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F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\Project (2).docx «11/30/2012» 12 Morton, Douglas, and Fred K. Miller
2006 Geologic Map of the San Bernardino and Santa Ana 30’ × 60’ Quadrangles, California. Version 1.0. Digital Preparation by Pamela M. Cossette and Kelly R. Bovard. Prepared by the United
States Geologic Survey in Cooperation with the California Division of Mines and Geology. Open File Report 2006−1217. Map Scale 1:100,000. Norris, R.M., and R.W. Webb 1976 Geology of
California, John Wiley and Sons, Inc., Santa Barbara. Reynolds, Robert E. 2007 Paleontological Resources Assessment South Coast Winery Rancho California Riverside County, California.
Prepared for the South Coast Winery, Resort and Spa by LSA Associates, Inc. LSA project number SGV0701. SGV0701. May 2007. 2004 Paleontological Resources Monitoring Program, Centex Homes
Bella Vista Parcel, Murrieta. LSA Associates, Inc. for Centex Homes, 11 p. 2002a Paleontological Resources Monitoring Program, Beaver Homes Butterfield III Tract. LSA Associates, Inc.
for Beazer Homes, 11 p. 2002b Paleontological Resources Monitoring Program, Beazer Homes Cliff Parcel, French Valley. LSA Associates, Inc. for Beazer Homes, 11 p. 2001 Paleontological
Resources Monitoring Program; Beazer Homes Butterfield Tract. LSA Associates, Inc. for Beazer Homes, 10 p. Reynolds, Robert E., and Robert L. Reynolds 1991 The Pleistocene Beneath our
Feet: Near-surface Pleistocene Fossils from Inland Southern California Basins. San Bernardino County Museum Association Quarterly V. 38(3 & 4), p. 41–43. Reynolds, Robert E., Robert
L. Reynolds, and A.F. Pajak III 1991 Blancan, Irvingtonian and Rancholabrean (?) Land Mammal Age Faunas from Western Riverside County, California:
San Bernardino County Museum Association Quarterly, v. 39, 39, p. 37–40. Rogers, T.H. 1965 Geologic Map of California, Santa Ana Sheet. California Division of Mines and Geology, Scale
1:250,000. Sharp, R.P. 1976 Geology Field Guide to southern California, Kendall/Hunt Publishing Company; 2nd edition, pp 181. Society of Vertebrate Paleontology 2010 Standard Procedures
for the Assessment and Mitigation of Adverse Impacts to Paleontological Resources Society of Vertebrate Paleontology. Impact Mitigation Guidelines Revision Committee. Pages 1–11. 1995
Assessment and Mitigation of Adverse Impacts to Nonrenewable Paleontologic Resources: Standard Guidelines. Society of Vertebrate Paleontology News Bulletin, No. 163, January 1995: 22–27.
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F O R N I A C:\Documents and Settings\Stuart.Fisk\Local Settings\Temporary Internet Files\Content.Outlook\9KQC2MO8\Project (2).docx «11/30/2012» 13 Springer, Kathleen, E. Scott, C. Sagebiel,
and K. Scott 1999 A late Pleistocene Lake-edge Vertebrate Assemblage from the Diamond Valley, Riverside County, California. Abstract, Jour. Vert. Paleo. V. 19(3), p. 77A.