Also known as Upper Matanuska Valley
Where: Alaska (62.0° N, 148.0° W: paleocoordinates 16.1° N, 76.6° W)
• coordinate estimated from map
• local area-level geographic resolution
When: Early/Lower Jurassic (201.4 - 174.7 Ma)
Environment/lithology: marginal marine; shale
Collection methods: surface (float), surface (in situ),
• composite of four localities 6698, 6699, 6700, and 6701 all vaguely defined
Primary reference: F. H. Knowlton. 1916. A Lower Jurassic flora from the upper Matanuska Valley, Alaska. Proceedings of the U.S. National Museum 51(2158):451-460 [A. Rees/D. Sunderlin/D. Sunderlin]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 24779: authorized by Allister Rees, entered by Dave Sunderlin on 20.08.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Polypodiopsida | |
Cladophlebis ? hirta Möller 1902 | |
Dictyophyllum nilssoni Brongniart 1836 | |
Equisetopsida | |
Pagiophyllum falcatum Bartolin 1916 | |
Pterophyllum rajmahalense, Pterophyllum aequale, Otozamites ? bornholmiensis, Otozamites pterophylloides
Pterophyllum rajmahalense Morris 1863
Pterophyllum aequale Brongniart 1825
Otozamites pterophylloides Brongniart 1870 | |
Ginkgoopsida | |
? Sagenopteris sp. Presl 1838 | |
Cycadopsida | |
Ctenophyllum ? angustifolim cycads | |
"Nilssonia polymorpha" = Nilsonia
"Nilssonia polymorpha" = Nilsonia cycads |