Hermit Shale, about one-quarter mile west of the sign "Red Top" (Permian of the United States)

Where: Arizona (36.1° N, 112.1° W: paleocoordinates 8.7° N, 36.7° W)

• coordinate based on nearby landmark

When: Hermit Shale Formation, Artinskian (290.1 - 279.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; lithified, red, sandy shale and lithified sandstone

• Paleoenvironment is extensively interpreted (p. 17-26). Successor basin to Antler Foreland; subsidence in Bird Spring Basin consistent with loading from northwest.
• Red, silts, sands and shales of the Hermit Shale. In some areas this red surface, which was slightly muddy, seems to have been intensely shrunken and cracked....Irregular fissures or "sun-cracks" reaching a maximum width of over 15 inches and extending downwards to depths of 25 feet or more...they are filled with the inswept light-colored Coconino sand, now cemented by silica so as to form quatzite (p. 8)

Size class: macrofossils

Preservation: mold/impression, adpression

Collected by C. W. Gilmore; reposited in the USNM

Primary reference: F. M. Carpenter. 1927. A fossil Insect from the Lower Permian of the Grand Canyon. Proceedings of the National Museum 71:1-4 [M. Clapham/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123973: authorized by Matthew Clapham, entered by Jered Karr on 04.02.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Meganisoptera - Meganeuridae
"Typus gilmorei n. sp." = Tupus gilmorei
"Typus gilmorei n. sp." = Tupus gilmorei Carpenter 1927 griffinfly
USNM 71279