SANDSTONES. 185 
SANDSTONES FROM CALIFORNIA. 
1. MOUNT DIABLO. 
Described by Turner and Melville in Bull. Geol. Soc. America, vol. 2, pp. 383-414. 
Analyses made by W. H. Melville in the San Francisco laboratory. 
A. Upper Cretaceous, Chico sandstone. Light brown, finely granular, carrying 
grains of mica and feldspar. 
B. Lower Cretaceous, Neocomian sandstone. Hard, granular, greenish. From 
headwaters of Bagley Creek. 
©. Miocene sandstone. Granular, particles light brown and black, friable. From 
near Wall Point. 
D. Chico sandstone. Greenish gray, compact, crystalline. 
SS B on D 
BIO = ciacacsiers seuss dame <n a eestasnginis xeislnns ois ans pieaetennaye Melee eeaielaaee Se 73.71 | 56.84] 44.54 | 36.93 
SANGO ia cecsin auton qusietialeeteonta tate alecacmyes a arsoeecettie: aia dra hance tac ioeeaiatet ats 10.40 | 11.37] 12.63 7,22 
Weg O scenic ot sient wyoecsawn aa elecahs oy SRUSEDAEN we SEO RERA SSS SEE eREE TEES 3.89} 1.46] 2.50 1.59 
FeO). scceas oy sanncioans oveaneciats) akgeetsne at a. Maca anes FasceseeeSeee 1.88) 4.95] 3.08 2.95 
MBO a seiciensexs sche earned SBIR SOO Seatashantiennne Ui egaeaaltea ae ucecaian esas 1.62] 3.10] 5.55 2.34 
CBO sso sicine atesiaientayaasegale's bitin sageialeee Ataeyacteesis oe ad Man senae mote auton 96| 7.62) 14.65] 29.34 
NSO apcc cece ehalat am Osan AF aN ana an CORA ees ne eatcenare’ 3.48} 3.26] 3.35 2.94 
BO at 66 FARO GHRE ap rOCSrnICN ER: 08 ia eH “3 
20 al PS ps earms am caserctenctees aes Soivicadapcbisis aie Gaceeadeusha Sa aiee reine a ag heeauee F ~ 45 le, é 
RsO Ab OVO 51 00 ccs Sieccdrcmpanc sc vepsioeeneieoe Se a klerNann Aa Gnaeerere ood Heaeemeeraere 2.60} 3.34] 2.25 3.45 
BOR ic niocaasctaaeaeeec gates ents oo tel quadwnt seaeenen Laue eenaes none -10 29 -16 
Mii Ovo sien conse comedincenaemocainanens ve An omnia es tuebn cieaeeaeneeeiae el 622 44 57 
CO a vtesaceiaw saute aiteeceniad oy Denes BE Ea ep SRE MEER ERE SS She none 5.10 7.76 | @11.30 
100.76 | 99.67 | 99.84) 100.00 
a 
a CO: determined by difference. 
Traces of organic matter are found in all four sandstones, but were not determined. 
2. SHASTA COUNTY. 
Described by J. 8. Diller in Bull. Geol. Soc. America, vol. 1, p. 411. The rock is 
made up of quartz, feldspar, and biotite, with a calcite cement. Serpentine, sphene, 
mmagnetite, and zircon also occur in it, but are less common. 
A. From Salt Creek, one-half mile above McNett’s. 
B. One and one-fourth miles below Ono Bridge, north fork of Cottonwood. 
C, D. Three-fourths of a mile below John Allen’s, Dry Creek. 
E. From John Allen’s, Dry Creek. 
Analyses A and B by T. M. Chatard, record No. 1106; ©, D, and E, by J. E. Whit- 
field, record Nos. 972,-973. 
» 
A B. C. D E, 
BIOS cca cmacenemsaiae ans yasaneummainved spetekinte idclseuncuis esis 48.13 | 48.10 | 59.10 | 61.60 54. 55 
AlIO3 eco2 con uss sec aense: He gets Svea eees Peeeed Lasse Shae ees 11.19 | 12.16} 14.02) 12.15 10. 64 
030332 sepeedisin xo heesaisisin dese ciety us Raia Bae SRR SR SRR RES DOES 1,25 1,02 3.16 2.09 1.59 
BOO. 8 cece isioigyays ida ayecdte stars bsSie exdiancin cinigeaiaie cost eletsin ease RES 1.47 2.14 1,42 3. 30 1.16 
MON 25a d eo popesalers scterecdi tress wieder ousbune mcleietmiok oareisiesansie setae ae Nae 2.22 1.65 1,72 2.33 1.29 
CaO sectemeas-ces ate ase aawsheinsaiciecanag semor el aiseeeciane oda: 16.39 | 15.88 9. 35 6.92 14.30 
IN B8O) ehcrccpatncsesecinrsrertiarmaiabe ac diaulcasik eas aeE clea TERS eeREE Ie 2.29 2. 46 2.21 2.16 2.60 
Kis Q) cueaicrscace asic ciate ape rioe arcisi sted arom elseiniasioiniincmaanitia te 1.17 1.56 1.49 1.41 1.68 
B20 at 110? sess vewserscneevekcewka peeaeaees earescsn same sccete a -78 WAG | ctrmanicies levee cswalyeverecs 
B30 at red Neat. woes. seen csesuiswsadeeews 1. te eR ok eee 1.78 3.27 2. 63 3.10 1.60 
NO arsioi3 ssid siciscaicsche 2 lg wrasaia Gare aloe aeiasie paatseine aa amen SERENE 24 47 -70 | trace trace 
Pa Os 52 aitscincea tess aan a eto oes RO iT SURE les Tee enee -14 -13 | trace 08 10 
MMO eae s eect See otaad th cokneeted Mine oneelen Gk emee 29 -26 | trace | trace 1.53 
BAO sero torcicicinecteyaimatsasioaeemeamncari ce eames aaaaiaees saeees 204 HUINGet:. | sccccen eancsasemeceees 
C8 sosackare seater macro sia eccrniate ts athaitrete, ard nicsishessiasis pelatntaahis acing 12.73 | 10.36 4. 65 5.05 9.05 
SO sie seneeees veeceaowben sesae eeacacae ee neeeese rarpescssarmiton. |negeaeagilhe ease trace 27 10 
GY os pews. cecinearoaeeauelnaaedenans aeeediga ns oh ete nvememetel eeeeesenl eaamenss trace | trace 72 
100.11 | 99.92 | 100.45 | 100. 46 100. 31 
