17 Top of section. Bed No 13. Sand cemented by iron oxide into lenses... ..........----+--+5- 14. Compact grey clay with sand lenses and seams of lignite........ 15. Brown clay with seams, up to 1 inch thick, of lignite........... ss: (OaTse SANG Wilh: CIN: on 5 0 eae ee LE Baerga 17. Brown clay, with seams up to 1 inch thick, of lignite........... eee eney Sale yClay oro ea ie eae Sage nies oe oe ee 19. Sand cemented by iron oxide, into lenses.............. puts. fie 20. Brown clay with nodules of: lignite: 20: 62. es ie 8s RE rey Cla es ak Bre ee ak A eee te ee De IM IILE eee i e S e a ie eee e ig e Pee ATOVLCIRY oo oe Ss eres Sete ee as epee he in mere al ts PEA Clay: 85 fet SE ee ee ee ee te gene es De CUTUILG 5c Pee Gah ees eee GA hg tee ts £4 oe Da eee pO rows Clee aa se Se pais Asc gd &. Ate e238 Ce ORESOONS 28 = ooh ee a OR, siete S eieee ye ithi eee lag ee ee Bo OEY Cla fee 8 ee ee ene oie ae ED ges 30. Irregular lenses of well-cemented silt with remains of leaves..... 31. Brown clay with sand lenses up to 1 foot thick, and with lignite ech iT ots peer eee Se rem Deer Peer RaRee ge ee meer ier rs ener DEY CIA ec Se as ee ee Bee : 33. Brown, carbonaceous clay with seams and lenses, up to 2 inches thick, Or iigiiee a es ee te. ee Se eee eA AROY Clays hho nace cee As Gaba epee. Sn eee the 39. rab elay with very litte lignite 6225 oo. oe oe ae. Se ie tet DONACCOULR-CIAYe. ga a ee gs Ws Pee Br Utey- Clay tree 1ronr Hentte. v8. > hk ee eee 38. Brownish grey clay, thin seams of carbonaceous matter........ So: Main. seam, lignite (nined) . 226 Shien A Be Pian rey Clyne 2 ee a ees ey ae ss es BE Pe ge ge I we Ea ge at vi oe rab clay. ce er ee Eee ee Oe A re ee es SO ae 44. Brown clay,full of carbonaceous matter.................5....-. Bere GOR EOTICE es oe ye ai She vn es bo ISG ’ Fraser River level. see oe eee eee eae see on. 6 te siete 4 Thickness in feet and inches. 1 BNF OR OFOCCORR Ee pb ODOOTWDMAHANNHOAOMD POHNODCOSSCOWS SO OO ct o) 1) oO Dawson speaks of these beds as the Lignite Group. The writer suggests the name Fraser River formation as being more definite. Dawson! col- lected a number of plants from these beds and decided that they were of Tertiary age, Miocene or older. Penhailow? has placed them in the Eocene. Because of their position between a series of disturbed and altered lavas corresponding to Dawson’s Lower Volcanics and of younger flat-lying basalts the writer believes that they represent a period of sedimentation corresponding to that of the Tranquille formation at Kamloops. And if Dawson’s Lower Volcanics are post-Oligocene these beds should be placed in the Miocene. UPPER VOLCANICS. The Upper Volcanics are typically developed on the Green Timber plateau. A section measured at the head of the gorge known as the ‘““Chasm,’”’ near 59 Mile House, shows a thickness of 203 feet of flat-lying - olivine basalts, in beds up to 25 feet thick, that are amygdaloidal for about 10 feet at the top, becoming denser downward with a thin layer of amygdules 1Dawson, G. M., Op. cit, p. 260. 2Penhallow, D. P., ‘‘Report on the Tertiary plants of British Columbia.’”’ Geol. Surv., Can., No. 1013, 1908 Deli: