oe

14

others, coloured by vegetable remains, vary from chocolate through
brown to black. The diatomaceous earth is cream-coloured to white,
very porous, and of low specific gravity. The lignites vary from brown |
carbonaceous clays to black lignites of good quality. The clays, lignites, ~
and diatomaceous earths are discussed further on later pages. ps

At the west end of the big bend of the Fraser (Figure 12, localities
1, 2, 3), the sediments are well exposed in cliffs rising to elevations of 500
feet above the river. One section (section No. 1) measured at the south
end of the cliffs, shows about 460 feet of cemented gravels and clays with
a few lignitic seams, the clay lying for the most part near the top of the
section. The details of this section are tabulated below.

Section No. 1.
Top of section. : Thickness in feet-
Boulder clay. =. 4.22.2 ves ean Set PR eat Scone oe Ee
1 BIS aes a Ric cs a ee ner See a eee 30
Cece ee eae eo Stes ba J eae Chee eae as 91
Alternating thin beds of clay and gravel.........0... 050. eee ee eee eee 2
Bt tay ee os Stele Swipes | osha shee esa Pets rie en ee 3
Cemented gravel. sso. orien as ee ec ge Ce eet 12
ec livicdt nec. Gly 2) oe re Ee or Seg te eke ee ee 5
Fipmry cemented pravels= =r: fs 62. ker. I. ae eee be eee 11
IMoitlen clay. ee Se 8 a as ct Oh Ga ne ae F oe eee 5
Moree IAC 6 hese oes, ee Ee sie ine boa R pe oe eee eee eS 8
Reddish yellow clay with, in middle, a bed of fine-grained, cemented
enn ee ee re ae ee
On Genle es rs ie ee Bae oe ees Pee 36
Alpernatine bands of clay and gravel s.:. 2. Sco... cs ae eee 8
peteg OD SHO NCD 0 De ee ngr aereere ieeaew ec Cgpure er eenpiaren cre Jeies er 14
Raye a Or a ko. Ge ioe, Fd a ee a ee 3
CLG EEANUNY: CUA Se 8 le ee se ee es ea eee ee 5
Alternating bands of chocolate and grey clay.............-..0.-..--265 42
Welcemented grey, sandy Clay... 2.0 ©. 08 Sok See ee Seta oy 34
Hine meiner pany 6s a < 2
Grey, yellow brown clay with lignite band.........................04- 43
Fine-grained gravel.......... ee re es ee 6
Sand and. erivel mnrepiiar beds... sci Oe eee ee 128
Sandy: clay ame ab 1Ope wee eo er cS set Pe gee 3
Gravel, reddish and cemented at top with iron oxide................... 15
GBH ye VOMOW: CIN sn pe so ies oe sie os sages ds GU oe eS 10
Grey, sandy clay, with a 1-foot band of fine-grained, well cemented gravel 20
EAE a a i ee 16
(rey Clty. ea a ey SS ee een 22
Dandy Homiiic Clays Gu cc ce es See ee ee ee 3
Gravel with one foot at top well cemented...................0.. 00000 28
SNS 2 koe aes ce 2 Se SRA erg eee acme oh Sa ee ne 2
@itsracter not recorded. 8. oe a ee a ca 25
Sandssciteaks Or ton Oudes.. of eS a ee a 2
Gravel MPR ae eo 27
Fraser River level. teOtahec te oe ee eee SC eee 6132

(The above section was measured on the west side of Fraser river, 8 miles north of
Quesnel, at west end of Big Bend, 2 miles west of section No. 2 (Figure 12, locality 4).
: Farther north along the cliffs in the direction of the dip, other sections
of the strata show that the higher parts of the general sedimentary section
contain more clay., On top of the steep cliffs are a number of masses of
diatomaceous earth and grey clay which have been affected by sliding