ammonites
Weir Fm, collection 5d-Patzkowsky (Silurian to of Canada)

Where: Canada (48.3° N, 65.0° W: paleocoordinates 23.2° S, 38.5° W)

• outcrop-level geographic resolution

When: Weir Formation, Llandovery to Llandovery (443.7 - 443.7 Ma)

• ""problematic...seems likely to fall in the range of Ashgill to Lower Llandovery. Provisionally assigned to early Llandovery.""

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, gray, green siltstone

• Lithologic description is for Weir Formation, not specifically for beds from which the collection was taken.
• Dark gray-green siltstone locally interbedded with quartz-pebble conglomerate, reddish gray arkosic sandstone, and minor silty limestone.

Size class: macrofossils

Primary reference: W. G. Ayrton, W.B.N. Berry, A.J. Boucot, J. Lajoie, P.J. Lesperance, L. Pavlides, and W.B. Skidmore. 1969. Lower Llandovery of the Northern Appalachians and Adjacent Regions. Geological Society of America Bulletin 80:459-484 [M. Patzkowsky/Z. Krug] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 11452: authorized by Mark Patzkowsky, entered by Zack Krug on 16.08.2001