a Foe
H : oh
At all localities east of Mile-post 378 on tho Alaska Highway, in

Tetsa Valley and east of a line a few miies west of the mouth of the
Toad River, on Liard River, the Liard formation disappears ani the, Triessic
section is as followss

TNoad formation (at tcp}

Grayling formation-

Important sections in which the Nathorstites-bearing strata are present

are described in detail below. Complete faunal lists are included.

is that exposed on Beattie Hill, situated on the north side of Peace River
between Ne and Aylard Creeks. .lt has veen sivdied in detail by the
writer (See Mchears, 190) and, in addition, collections have been made by
M.Y. Williams, J.B. Bocock. H.H. Beach, O-Mt. Sternberg, and others. It

may be summarized as follows:

Top Feet
(approx.)

4

'G@rey beds? - ue Hh
Grey, light grey weathering, mostly thick-vedded, I %i
.massivo, calcareous, very fine sandstone, siltstone,
and impure grey, shelly and silty limestone with
Lingula,» ------*----~--+---+-+4~-------~--------+--------<> 800

'G.’ silvana, Monotis? montini, Pecten tranquillianus :
fstrea atsina n. sp.;, Pleuromya sp: -------+----~-~----- Pe OO

Similar beds with Spiriferina onestae, !Coenothyris:
 petriana, 'C.' silvana, Monotis / montini,
Daonella nitanas, Modiolus ahsisi, Lima cf. austriaca
Bittner, Pecten tranquillianus, Pecten sp-, Ostrea iain

vi >

var. lenticularis Whiteaves, Paratrachyceras caurinum n. sp. 200

ns

Dark siltstones!

Dark grey and brownish grey, somewhat sarbonaceous,
calcarsous, fissile, shaly or ‘slabby’ siltstone with
some layers and.lenses of dark, silty, partly carbon
‘aceous limestone, carrying at about 100 to 430 feet
above the base, §piriferina onestae, !Goenothyris!
petriana, 'C.! silvana, Monotis? montini, Daonella
nitanae, Posidonomya sp», Myophoria cf. urd Boehm,
Modiolus ahsisi, isculites schooleci, I. schooleri var.