

— 
ae a 
The beds 
below the 
CRETACEOUS AND TERTIARY—EAST FORK MILK RIVER. 
FERT. IN. 
. Sombre Cretaceous clay-shales, Division 4. M. & H...... 
Grey and yellow arenaceous clays, with some remains of 
Ostrea in the lower layers (about)..............-..,.. 20 O 
Greyish-white arenaceous clay, with irregular sheets of 
SMITE TA Cua EEG TDN loo tha se vig Sis Saha vnw ewes « 6 
ESN Ah g05 nm Ais a by apm a's eo sm win x hg dowd ron 
eee MENTE S01, Sindh wa c gie'm nina «a viel a eweriae 2 6 
a 2 0 
Dark shales, with carbonaceous bands.................. 12 6 
Carbonaceous shale, with poorly preserved plant remains 1 6 
Grey arenaceous clay eee aaa ae eS: tem wig ata a/e tal ano ae 30 0 
Brown shale, with indistinct impressions of plants, a few 
inches 
Pee NERNIE TMS  os  cian cna do wna o's 04,0 Fic ae wee 3 6 
Laminated carbonaceous shale, with spots of amber, and 
an MMMM 8095) en alba 3 pelea cs (nin ot Ejviage «3 2 0 
Grey and yellow arenaceous clay.............. rah! ak, 
Me aa a it -2 
Ce ES eae aie BER Rae FAs ee ee 0 
Soft beds—probably yellowish arenaceous clays, but not 
OE es ee Ae BR FOROS aie rape Sai Sains oe Rene 35 9 
Grey sandstone, weathering yellow, and with many 
as ean ene ee 12 10 
Spaces eecraarcns Olay a 0258) dee ee GEUL 45 11 
Hard sandstone, breaking into large rectangular frag- 
ments, and weathering into pot-holes................ 0 
eee Meteo CLARY SU) 9 2 ti 25s 3 S25 lcnita ciel 12 10 
Fine-grained grey-yellow sandstone, with dendritic mark- 
ie SN ae Sy 1 ae ae ane eae 2 0 
Grey and yellowish arenaceous clay, with some thin sheets 
ee NON MR Te aioe ooo aw phd Simla Sala oh A weiss ee 5 
eS ke RR ae Sa Ce ee 2 0 
a SS se © ee a eee 6 5 
adultes law. semacbome. 2 is. sc sis sc be wen eae ee 0 6 
Soft beds, with some thin sandstone layers. ........... 24 0 
Nodular red-brown sandstone (about).................. 3 0 
Greyish and yellowish arenaceous clays, well stratified, 
and with small fragments of some lamellibranchiate 

ee he a a EE eA ene eee 88 5 
Greyish and yellowish arenaceous clays, well stratified. .121 10 
CO ES. Seas | i eS aie By ne ee 3 0 
Brownish arenaceous clays, crumbling and rotten where 
Le 5 AA epee RS ee a ee 134 4 
Eg Pe ee 1 6 
Yellowish sandstone, thin-bedded and flaggy ts Ae ee 34 0. 
Purplish and brownish clays, with evident stratification 
SE Nica oe apdiete 1 TS aS ty I S98 ee 47 7 
PE INCI 3s. IP Da Jaen SARIS cobis sick ne as | as 
ey EE CRN Sa Us dite sila wos wh eck ain «oes 127 3 
CS SELES teh Bats AE | a 
Crecmmipinins Gartiry-Chaye 5 o.oo onid cls apie won bic done sceee 26 6 
893 7 
115 
below these are not exposed sufficiently well to enable the 
section to be measured. From blocks of sandstone strewing the banks, 
however, it is probable that one or more layers of this rock occur not far 
base, as here given. 
282, When this section was examined, I had no doubt that the whole 
a 
