GEOLEX

Summary of Citation: Tejon

Publication:
Gabb, W.M., 1869, Cretaceous and Tertiary fossils: California
   Geological Survey, Paleontology, v. 2, 299 p.

Usage in Publication:
Tejon group

Modifications:	Geologic Province:	Dominant Lithology:
Named	San Joaquin basin	Coal

Summary:
Tejon Group most modern member, Division B of Palaeontology v.1 is peculiar to CA. Found extensively in vicinity of Fort Tejon and about Martinez. Forms almost continuous belt in Coast Ranges to Marsh's, 15 mi east of Monte Diablo, where it sinks under San Joaquin plain. It was also discovered on eastern face of same range as far south as New Idria and north in Mendocino Co near Round Valley. Is only coal-producing formation in CA. Contains large and highly characteristic series of fossils. Considered to be probable equivalent of Maestrichtian beds of Europe.

Summary of Citation: Tejon

Publication:
Lindgren, Waldemar and Turner, H.W., 1895, Description of the
   Marysville sheet [California]: U.S. Geological Survey Geologic
   Atlas of the United States, Marysville folio, no. 17, 3 p.,
   scale 1:125,000

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Revised	San Joaquin basin

Summary:
Mapped as Tejon formation in Marysville 30' quad in sedimentary area northeast of village of West Butte. Composed of greenish sandstone and shale. Some beds contain abundant marine fossils characteristic of Tejon among which are TRACHOSMILIA STRIATA Gabb and CARDITA PLANICOSTA. Underlies Neocene andesite and underlies Ione formation.

Summary of Citation: Tejon

Publication:
Merriam, J.C., 1897, The geological relations of the Martinez
   group of California at the typical locality: Journal of
   Geology, v. 5, p. 767-775

Usage in Publication:
Tejon group

Modifications:	Geologic Province:	Dominant Lithology:
Age modified	San Joaquin basin

Summary:
Tejon group proposed by Gabb(1869) on paleontological grounds for set of rocks supposed by him to be Cretaceous, but now generally regarded as Eocene. Fauna of Martinez group are compared with those of Tejon group.

Summary of Citation: Tejon

Publication:
Turner, H.W. and Ransome, F.L., 1897, Description of the Sonora
   quadrangle [California]: U.S. Geological Survey Geologic
   Atlas of the United States, Sonora folio, no. 41, 7 p., scale
   1:125,000

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Mapped in Sonora 30' quad, Mariposa Co, CA in low hills in southeast corner of quad. South and southeast of Mercer Falls are 2 level-topped buttes capped by Tejon formation. Basal bed is crowded with angular fragments of slate and pebbles of white vein quartz; upper beds composed of light-colored quartzose sandstone with frequent bands of small quartz pebbles. Upper beds contain marine fossils (VENERICARDIA PLANICOSTA). Unconformably underlies Ione formation to west.

Summary of Citation: Tejon

Publication:
Bagg, R.M., Jr., 1905, Miocene Foraminifera from the Monterey
   shale of California with a few species from the Tejon formation:
   U.S. Geological Survey Bulletin, 268, 78 p.

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Adopted	San Joaquin basin

Summary:
NODOSARIA OBLIQUA and CRISTELLARIA CREPIDULA found in calcareous beds of Tejon formation near New Idria in De los Reyes Canyon, CA (given to author by T.W. Stanton of U.S. Geological Survey).

Summary of Citation: Tejon

Publication:
Arnold, R.A., 1906, The Tertiary and Quaternary pectens of
   California: U.S. Geological Survey Professional Paper, 47,
   264 p.

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating	San Joaquin basin

Summary:
Type locality is region about Fort Tejon, Kern Co, CA. Correlation table shows Tejon formation (4000 ft+) to be unconformably overlain by San Lorenzo formation in north and central CA, by Vaqueros sandstone in Salinas and southern San Joaquin valleys, and by Pasadena [formation] in southern CA. Overlies Martinez formation in northern and central CA and Rock Creek [!] in southern CA. List of Eocene fossils from Tejon formation included in this paper.

Summary of Citation: Tejon

Publication:
Arnold, R.A. and Anderson, Robert, 1907, Geology and oil resources
   of the Santa Maria oil district, Santa Barbara County,
   California: U.S. Geological Survey Bulletin, 322, 161 p.,
   (incl. geologic map, scale 1:125,000)

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Mapped undifferentiated with Vaqueros, Sespe, and Monterey (part of) formations in Santa Ynez Range. List of Tejon (Eocene) fossils with locations in Santa Maria district is included.

Summary of Citation: Tejon

Publication:
Arnold, R.A. and Anderson, Robert, 1908, Preliminary report on
   the Coalinga oil district, Fresno and Kings Counties,
   California: U.S. Geological Survey Bulletin, 357, 142 p.,
   (incl. geologic map, scale 1:125,000)

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	San Joaquin basin

Summary:
Mapped in Coalinga district, Fresno and Kings Cos, CA. Described as sandstone, sand, clay, gravel, siliceous and calcareous diatomaceous and foraminiferal shale. Is at least 2300 ft thick north of Pleasant Valley and about 1000 ft near Canoas Creek along Reef Ridge. Overlies Chico formation. Unconformably underlies Vaqueros sandstone. Age is Eocene based on age of included fossils.

Summary of Citation: Tejon

Publication:
Arnold, R.A., 1909, Environment of the Tertiary faunas of the
   Pacific Coast of the United States: Journal of Geology, v.
   17, p. 509-533

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Correlation table shows Tejon formation in Mount Diablo region, Santa Maria district, and Coalinga district. Martinez or Tejon formation is shown in San Diego region.

Summary of Citation: Tejon

Publication:
Anderson, Robert, 1910, Preliminary report on the geology and
   possible oil resources of the south end of the San Joaquin
   Valley, California: U.S. Geological Survey Bulletin, 471, p.
   106-136

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Mapped	San Joaquin basin

Summary:
Shown on reconnaissance map of south end of San Joaquin Valley on north flank of San Emigdio Mountains eastward beyond Pastoria Creek on north flank of Tehachapi Range. Consists of marine sedimentary beds of sandstone, shale, and conglomerate, locally indurated and highly fossiliferous at some horizons. Overlies granite of pre-Cretaceous? age). Underlies later Tertiary rocks. Is Eocene age.

Summary of Citation: Tejon

Publication:
Arnold, R.A. and Johnson, H.R., 1910, Preliminary report on the
   McKittrick-Sunset oil region, Kern and San Luis Obispo
   Counties, California: U.S. Geological Survey Bulletin, 406,
   217 p., (incl. geologic map, scale 1:125,000)

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Mapped in McKittrick-Sunset oil region, Kern and San Luis Obispo Cos, CA. Described as grayish to buff massive and nodular sandstone with minor amount of clay, shale, and conglomerate. In Devils Den region contains fossiliferous ledge at base. Measured section at Point of Rocks is 2300 ft thick. Beds dipping about 30 deg NE rise in prominent pinnacles over 100 ft in height at Carneros Spring.

Summary of Citation: Tejon

Publication:
Arnold, R.A. and Anderson, Robert, 1910, Geology and oil resources
   of the Coalinga district, California: U.S. Geological Survey
   Bulletin, 398, 272 p., (incl. geologic map, scale 1:125,000)

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Mapped	San Joaquin basin

Summary:
In vicinity of Oil City has thickness of 1850 ft and comprises lower sandy and clayey member (850 ft thick) and upper organic shale member (at least 1000 ft thick). Cross section and measured section at Big Tar Canyon are 1325 ft thick. Detailed report on occurrences, lithology and fossils. Unconformably overlies probable Knoxville(?) formation and unconformably underlies Vaqueros formation. Shown on map of Coalinga oil district as Eocene age.

Summary of Citation: Tejon

Publication:
Lawson, A.C., 1914, Description of the San Francisco district;
   Tamalpais, San Francisco, Concord, San Mateo, and Haywards
   quadrangles [California]: U.S. Geological Survey Geologic
   Atlas of the United States, San Francisco folio, no. 193, 24
   p., scale 1:62,500

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Mapped in S.F. and Concord 15' quads. Best exposed in area northeast of Franklin anticline where thickness is not less than 2000 ft. Belt of Tejon is continued on southeast side of Ygnacio Valley in 2 spurs of Mount Diablo that embrace lower part of Pine Canyon. Also appears in Sobrante anticline where it is flanked on both sides by strata of Monterey age. List of fossils from Concord quad identified by Roy E. Dickerson. Unconformably overlies Martinez formation. Unconformably underlies Sobrante sandstone, Rodeo shale, Briones sandstone, or Temescal formation. Is Eocene age.

Summary of Citation: Tejon

Publication:
Clark, B.L., 1918, Meganos group, a newly recognized division
   in the Eocene of California: Geological Society of America
   Bulletin, v. 29, p. 94, 281-296

Usage in Publication:
Tejon group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Joaquin basin

Summary:
Name Tejon group (of late Eocene age) restricted to beds containing "typical Tejon fauna". Recognized above unconformity in deposits on Mount Diablo, CA. Tejon group unconformably overlies Meganos group (new) (of early Eocene age). Comparison is made between faunas of Meganos and Tejon groups.

Summary of Citation: Tejon

Publication:
Kew, W.S.W., 1919, Structure and oil resources of the Simi
   Valley, southern California: U.S. Geological Survey Bulletin,
   691, p. 323-347, (incl. geologic map, scale 1:62,500)

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Mapped in Simi Valley, Ventura and Los Angeles Cos, CA. Composed of mainly gray shale interbedded with conglomerate and brown sandstone. Well logs show 2000 to 2500 ft thick. Measured section near mouth of Llajas Creek is 4415 ft thick. Unconformably underlies Sespe formation and in some areas Fernando formation. Overlies Martinez formation [see Kew (1924) for recognition of Meganos formation]

Summary of Citation: Tejon

Publication:
Kew, W.S.W., 1924, Geology and oil resources of a part of Los
   Angeles and Ventura Counties, California: U.S. Geological
   Survey Bulletin, 753, 202 p., (incl. geologic map, scale
   1:62,500)

Usage in Publication:
Tejon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Tejon formation (of Clark, 1918, as restricted) is mapped in 2 areas widely separated by Santa Clara River and Oak Ridge and structurally by San Cayetano fault. Larger area lies west of Sespe Creek in northwest corner of Camulos quad. Other area is in Simi Valley. In Simi Valley consists of brown medium- to coarse-grained sandstone and conglomerate. On San Cayetano Mountain consists of following (shown separately on map): lower hard greenish-brown shale, lower quartzitic hard sandstone, upper hard greenish-brown shale, upper hard brown sandstone, and uppermost 400 ft of light-gray coarse sandstone locally known as "Coldwater sandstone". Unconformably overlies Meganos formation. Apparently unconformably underlies Sespe formation. Fossils are rare but do indicate Tejon age (Eocene).

Summary of Citation: Tejon

Publication:
Anderson, F.M. and Hanna, G.D., 1925, Fauna and stratigraphic
   relations of the Tejon Eocene at the type locality in Kern
   County, California: California Academy of Sciences Occasional
   Papers, no. 11, 249 p.

Usage in Publication:
Tejon Group

Modifications:	Geologic Province:	Dominant Lithology:
Overview	San Joaquin basin

Summary:
Structure, lithology, thicknesses ... along Tecuya Creek, Grapevine Canyon, Live Oak Canyon, Salt Creek, Pastoria Creek are discussed. Review of earlier papers. List of valid Tejon species. Purpose of paper to restore potential usefulness of name Tejon and to determine fauna beginning at type locality near old Fort Tejon.

Summary of Citation: Tejon

Publication:
Bailey, T.L., 1930, The geology of the Potrero Hills and Vacaville
   region, Solano County, California: University of California
   Publications in Geological Sciences, v. 10, no. 15, p.
   321-323

Usage in Publication:
Tejon formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Joaquin basin

Summary:
Tejon fossils were discovered in upper part of so-called Markeley formation on south side of Potrero Hills NW/4 sec.15 T4N R1W, Solano Co, CA. Mapped as Tejon formation on basis of fossil collection containing TURRITELLA UVASANA (Conrad) identified by B.L. Clark. Measured section on south side of Potrero Hills describes unit as grayish-brown rather massive-bedded, generally medium-grained, but poorly sorted, richly micaceous, arkosic sandstone 1,300 ft thick. Underlies with angular unconformity tuff, conglomerate and sandstone of Pliocene age. Overlies Domengine formation. Is Eocene age.

Summary of Citation: Tejon

Publication:
Jenkins, O.P., 1931, Stratigraphic significance of the Kreyenhagen
   shale of California: California Journal of Mines and Geology,
   v. 27, no. 5, p. 141-186

Usage in Publication:
Tejon formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Joaquin basin

Summary:
Sandstone beneath Kreyenhagen shale on Reef Ridge mapped by [Arnold and Anderson, 1908] as Tejon formation was originally called Avenal sandstone by F.M. Anderson (1905). Locally this unit may more conveniently continue to be called Avenal sandstone. On Reef Ridge south of Coalinga, upper shale member of Tejon of Arnold and Anderson (1910) is considered to be Kreyenhagen shale proper.

Summary of Citation: Tejon

Publication:
Taff, J.A., 1935, Geology of Mount Diablo and vicinity: Geological
   Society of America Bulletin, v. 46, no. 7, p. 1079-1100,
   Discussion by Bailey Willis and reply, p. 2040-2045.

Usage in Publication:
Tejon group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Joaquin basin

Summary:
Tejon group comprises (ascending): Domengine (1500 +/-ft) and Meganos (3000 +/-ft) formations separated by unconformity. Meganos had been included as part of Tejon group in this area (Clark, 1918). Meganos and Domengine mapped together for convenience as Tejon group.

Summary of Citation: Tejon

Publication:
Clark, B.L. and Vokes, H.E., 1936, Summary of marine Eocene
   sequence for western North America: Geological Society of
   America Bulletin, v. 47, no. 6, p. 851-878

Usage in Publication:
Tejon stage

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Joaquin basin

Summary:
Tejon stage used based on faunal assemblages. Occupies interval between Transition Stage above Domengine Stage and below Gaviota Stage. Review of literature.

Summary of Citation: Tejon

Publication:
Marks, J.G., 1941, Stratigraphy of the Tejon formation in its
   type area, Kern County, California [abs.]: Geological Society
   of America Bulletin, v. 52, no. 12, pt. 2, p. 1922

Usage in Publication:
Tejon formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Joaquin basin

Summary:
4 conformable members named (ascending): Uvas conglomerate member (type locality at Grapevine Canyon), Liveoak member (type locality at Liveoak Canyon), Metralla sandstone member (type locality at Reed Canyon), and Reed Canyon silt member (type locality at Reed Canyon). Tejon marine sediments form wedge of steeply dipping strata 410 ft thick at Pastoria Creek and 4,280 ft in Reed Canyon 25 mi east of Tecuya Creek. Tejon formation unconformably overlies granitic rocks and unconformably underlies Tecuya formation at type area in Kern Co, CA.

Summary of Citation: Tejon

Publication:
Watson, E.A., 1942, Age of Martinez formation of Pacheco syncline,
   Contra Costa County, California: American Midland Naturalist,
   v. 28, no. 2, p. 451-456

Usage in Publication:
"Tejon"

Modifications:	Geologic Province:	Dominant Lithology:
Overview	San Joaquin basin

Summary:
Eocene section in Pacheco syncline is conformable sequence about 5400 ft thick. Mapped as Martinez and Tejon formations by Merriam (1897), Dickerson (1914), Lawson (1914), and Weaver (1932). Name Tejon applied to upper 2800 ft on basis of supposed equivalence in age rather than in lithology to type Tejon in Kern Co. Since exact contemporaneity difficult to prove and since strata great distance from type, might be advisable use term Markley. Present report uses "Tejon". Fauna of lower 1500 ft fall in "Tejon and Transition Stage" of Clark and Vokes (1936). Upper part thought to be equivalent in age to Kreyenhagen as mapped by Taff (1935) on north side of Diablo. Overlies Martinez with gradational contact; underlies San Ramon formation.

Summary of Citation: Tejon

Publication:
Putnam, W.C., 1942, Geomorphology of the Ventura region,
   California: Geological Society of America Bulletin, v. 53,
   no. 5, p. 691-754

Usage in Publication:
Tejon group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Joaquin basin

Summary:
Used as group term in Ventura region; includes (ascending); Matilija, Cozy Dell, and Coldwater formations. Underlies Sespe formation; overlies undifferentiated Eocene rocks.

Summary of Citation: Tejon

Publication:
Kelley, F.R., 1943, Eocene stratigraphy in western Santa Ynez
   Mountains, Santa Barbara County, California: American
   Association of Petroleum Geologists Bulletin, v. 27, no. 1,
   p. 1-19

Usage in Publication:
"Tejon" formation

Modifications:	Geologic Province:	Dominant Lithology:
Not used	San Joaquin basin

Summary:
"Tejon" formation of earlier workers in Eocene section at Canada de Santa Anita, Santa Barbara Co, CA is subdivided into (ascending): Anita shale (new), "Matilija" sandstone, "Cozy Dell" shale, Sacate formation (new name, formerly called "Coldwater" by Watts (1856), and Gaviota formation.

Summary of Citation: Tejon

Publication:
Weaver, C.E. (chairman), 1944, Correlation of the marine Cenozoic
   formations of western North America [Chart No. 11]: Geological
   Society of America Bulletin, v. 55, no. 5, p. 569-598

Usage in Publication:
"Tejon" formation

Modifications:	Geologic Province:	Dominant Lithology:
Not used	San Joaquin basin

Summary:
Foraminifera of lower 250 ft of "Tejon" formation in Pacheco syncline suggest correlation of this part of section with Canoas silt (basal) member of Kreyenhagen. Not certain whether basal part of Tejon of this syncline or upper part of Martinez formation should be correlated with type Domengine. On northeast flank of syncline, about 800 ft above base of "Tejon" are beds containing TURRITELLA UVASANA AEDIFICATA which is also abundant in sandstone of 'Domengine Stage" on south side of Mount Diablo. Upper part of "Tejon" occupies same stratigraphic position and has same foraminiferal species in upper part as does Markley formation in its type locality.

Summary of Citation: Tejon

Publication:
Weaver, C.E., 1953, Eocene and Paleocene deposits at Martinez,
   California: Washington University-Seattle Publications in
   Geology, v. 7, 102 p.

Usage in Publication:
Tejon formation

Modifications:	Geologic Province:	Dominant Lithology:
Not used	San Joaquin basin

Summary:
Eocene rocks south of Martinez in Concord quad were mapped by Lawson (1914) as Martinez and Tejon formations. Contact as shown on maps of San Francisco folio between Martinez and Tejon on west limb of Pacheco syncline corresponds approximately to boundary between Escobar and Muir sandstones (both new) of present report. Tejon of west limb of syncline is herein classified as Escobar sandstone and overlying Alhambra formation (new) with its three members. Tejon as mapped on east limb in San Francisco folio is now replaced by middle Eocene Muir sandstone, upper Eocene Escobar sandstone and Alhambra formation.

Summary of Citation: Tejon

Publication:
Brice, J.C., 1953, Geology of Lower Lake quadrangle, California:
   California Division of Mines and Geology Bulletin, no. 166,
   72 p., (incl. geologic map, scale 1:62,500)

Usage in Publication:
Tejon formation

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Described and mapped in oval area about 1.25 sq mi east of Lower Lake in Lower Lake 15' quad, Lake and Sonoma Cos, CA. Consists principally of white conglomeratic sandstone about 1100 to 1200 ft thick. Unconformably underlies Cache formation; unconformably overlies Martinez formation. Is Eocene age. According to Dr. J.W. Durham (oral commun., 1950) presence of WHITNEYA FICUS Gabb indicates Tejon formation at Lower Lake may be correlated with "now restricted Tejon".

Summary of Citation: Tejon

Publication:
Vedder, J.G., 1972, Revision of stratigraphic names for some
   Eocene formations in Santa Barbara and Ventura Counties,
   California, IN Contributions to stratigraphy, 1971: U.S.
   Geological Survey Bulletin, 1354-D, p. D1-D12

Usage in Publication:
Tejon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Not used	San Joaquin basin

Summary:
Former designation of Matilija Sandstone, Cozy Dell Shale, and Coldwater Sandstone as subunits within Tejon Formation is now considered to be inappropriate because Tejon type area is 40 mi to northeast and is on opposite side of San Andreas fault along which there has been many miles of post-Eocene right-lateral slip.

Summary of Citation: Tejon

Publication:
Nilsen, T.H., 1972, Stratigraphy and sedimentation of the Tejon
   Formation, San Emigdio Mountains, California: Pacific Petroleum
   Geologists Newsletter, v. 26, no. 1, p. 5

Usage in Publication:
Tejon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified	San Joaquin basin

Summary:
Tejon Formation in its type area comprises: (1) basal nearshore conglomerate-sandstone that grades up into (2) finer-grained sandstone and shales deposited farther offshore, and (3) overlying sandstones with some interbedded conglomerate and shales deposited near regressing shoreline. Members are (ascending); Uvas Conglomerate, Liveoak Shale, Metralla Sandstone, and Reed Canyon Siltstone Members. [names slightly altered from Marks (1941)]. Is middle and late Eocene age based on marine megafauna and microfauna evidence.

Summary of Citation: Tejon

Publication:
Nilsen, T.H., 1973, Continental-margin sedimentation of the
   Eocene Tejon Formation, western Tehachapi and San Emigdio
   Mountains, California [abs.]: American Association of Petroleum
   Geologists Bulletin, v. 57, no. 4, p. 797

Usage in Publication:
Tejon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified	San Joaquin basin

Summary:
Age is early, middle, and late Eocene based on megafossils in basal Uvas Conglomerate Member.

Summary of Citation: Tejon

Publication:
Nilsen, T.H., 1987, Stratigraphy and sedimentology of the Eocene
   Tejon Formation, western Tehachapi and San Emigdio Mountains,
   California: U.S. Geological Survey Professional Paper, 1268,
   110 p., (incl. geologic map, scale 1:62,500)

Usage in Publication:
Tejon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Overview Age modified	San Joaquin basin

Summary:
Mapped with 4 members in western Tehachapi and San Emigdio Mountains, CA. Review of literature, type and measured sections for each member, lists of fossils, detailed lithology, sedimentary structures included. Use of term "Tejon Formation" is restricted for marine rocks in San Emigdio and western Tehachapi Mountains. Use of "Tejon Formation" to describe Eocene rocks in other areas should be abandoned. Age of Reed Canyon Siltstone Member is considered to be middle and late(?) Eocene (late Narizian and Refugian(?)) age based on pelecypods collected at Salt Creek. Age of Tejon Formation is early, middle, and late(?) Eocene.

Summary of Citation: Tejon

Publication:
Sims, J.D., 1988, Geologic map of the San Andreas fault zone in
   the Cholame Valley and Cholame Hills quadrangles, San Luis
   Obispo and Monterey Counties, California: U.S. Geological
   Survey Miscellaneous Field Studies Map, MF-1995, 1 sheet,
   scale 1:24,000

Usage in Publication:
Tejon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	San Joaquin basin

Summary:
Mapped near Jack Ranch fault, Gold Hill, Monterey Co, CA. Consists of conglomerate and sandstone of Uvas Conglomerate Member of Tejon Formation and sandstone of Tejon Formation. Age shown as Eocene.