STRATIGRAPHY, 27 
Section of Sundance formation in Freezeout Hills, Wyoming. 
Feet. 
15. Purplish clay with sandy inclusions; has sandy limestone layer 
near base filled with fossils 40 
14. Greenish sandstone, thinly laminated 2-5 
13. Purplish fossiliferous clay with many lime nodules idled with 
fossils 20 
12. White sandy clay; saurian remains 4 
11. Sandy clay with brown concretions (apparently do fossils); 
green sandstone layer near middle 6 
10. White sandy limestone, in thin layers (fossils) \ 
9. Sandy red clay 10 
8. White fissile sandstone 6 
7. Shale, reddish, changing to purple 4 
6. White sandstone, moderately hard \ 
2-5. White sandstones separated by two layers of red clay 1 
1. Red clay of Chugwater formation. 
944- 
Possibly beds 2 to 9 belong in the Chugwater formation and perhaps 
the unfossiliferous portion of bed 15 may be a part of the Morrison. 
Fossils. — In the section given above, Logan reports the following 
fossils : 
Bed 10, Pseudomonotis carta; bed 12, remains of Ichthyosaurus and Plesiosaurus; 
bed 13, abundant Belemnites densus throughout, and in the concretions Pinna Jcingi, 
Pinna sp., Cardioceras cordiforme, Avicula beedei, Astarte packardi, Pentacrinus astericus, 
Tancredia bulbosa, T. magna, Lima lata, Goniomya montanaensis, Avicula mucronatus, 
Pleuromya subcompressa, Cardinia wyomingensis, Pseudomonotis curta, Belemnites 
densus, and B. curtus, and also remains of plesiosaurs and ichthyosaurs ; bed 14, Camp- 
'tonectes bellistriatus, C. extenuatus, Ostreadensa, and O.stngilecula; in a sandy limestone 
in base of bed 15, Pentacrinus astericus, Asterias dubium, Pseudomonotis curta, Avicula 
mucronatus, and Ostrea strigilecula. 
The following fossils occur in the limestone layers in the Sundance 
formation on Como Ridge and in other outcrops to the north and 
west: Pseudomonotis curta, Pleuromya newtoni, Goniomya montana- 
ensis, an echinoid spine, and Belemnites densus. 
It is reported that belemnites have been found a mile or so south- 
east of Morgan, but no traces of the formation were found in that 
vicinity. / 
V^CRETACEOUS SYSTEM. 
MORRISON FORMATION. 
Distribution and general relations. — The outcrop of the Morrison 
formation extends along the east side and around the south end of the 
Laramie Basin, and it also appears in the uplifts east/ and north of 
Medicine Bow, east of Rock Creek, in the Freezeout Hills, and in the 
line of ridges of which Bootheel Butte is a part. For a large portion 
of its course, however, especially between Rock Creek and Laramie 
and in the Little Medicine Bow basin, it is coverep! by Tertiary and 
Quaternary deposits. Two narrow zones of outcrop extend along 
both sides of the Centennial Vallev and the formation shows for 
