Where: Nevada (41.6° N, 118.6° W: paleocoordinates 24.4° N, 55.7° W)
• coordinate based on nearby landmark
When: Sunrise Formation, Sinemurian (199.3 - 190.8 Ma)
• From Poulton, 1979 ; "Field number 714C-D (collected by S.W. Muller, Stanford University) indicates that it was obtained from division 8 of Muller and Ferguson (1939, p. 1611, 1612), which also contains Eoderoceras Spath. This ammonite genus is Late Sinemurian (Imlay, 1968)"
Environment/lithology: marine; limestone and medium-grained, gray sandstone
•USNM 219929, from 714B in limestone which could be termed 'oolitic' as Muller and Ferguson (1939) described Unit 6
•USNM 219934, 219935, from 714D "occur in medium-grained, grey to pink 'greywacke'."
Size classes: macrofossils, mesofossils
Collected by S.W. Muller; reposited in the USNM
Primary reference: T. P. Poulton. 1979. Jurassic Trigoniid Bivalves from Canada and Western United States of America. Geological Survey of Canada Bulletin 282 [G. Stanley/H. Shepherd/H. Shepherd]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 139744: authorized by George Stanley, entered by Hannah Shepherd on 16.02.2013
Creative Commons license: CC BY (attribution)