Meilyn Quarry, Flat Top Anticline (Jurassic of the United States)

Also known as WY-83

Where: Carbon County, Wyoming (42.0° N, 106.1° W: paleocoordinates 37.0° N, 51.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Morrison Formation, Kimmeridgian (157.3 - 152.1 Ma)

• low in the Morrison Fm.

• bed-level stratigraphic resolution

Environment/lithology: "channel"; fine-grained sandstone and green, calcareous mudstone

• low-lying drainage basin with lake beds and small streams; "an ephemeral fluvial system"
• "sandstone...interbedded with green mudstone. The upper layers often exhibit low-angle ripple marks and horizontal bedding with an occasional dinosaur track. The bones are concentrated at the base and intermingled with rip-up clasts. Immediately below the quarry sand is a non-swelling green mudstone containing significant amounts of carbonaceous plant debris."

Size class: macrofossils

Preservation: mold/impression, soft parts

Collected in 1993-1995

Collection methods: quarrying, mechanical,

Primary reference: D. E. Schmude and C. J. Weege. 1996. Stratigraphic relationship, sedimentology, and taphonomy of Meilyn, a dinosaur quarry in the basal Morrison Formation of Wyoming. In M. Morales (ed.), The Continental Jurassic. Museum of Northern Arizona Bulletin 60:547-554 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 38884: authorized by Matthew Carrano, entered by Matthew Carrano on 12.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda -
Allosaurus sp.3
Allosaurus sp.3 Marsh 1877 allosauroid
adult and juvenile
 Ornithischia - Stegosauridae
"Stegosaurus mjosi" = Hesperosaurus mjosi2
"Stegosaurus mjosi" = Hesperosaurus mjosi2 Carpenter et al. 2001 ornithischian
 Ornithischia -
Ankylosauria indet.1
Ankylosauria indet.1 ankylosaur
"an Ankylosaurus armor scute", but actual genus not nmeant
 Ornithischia - Dryosauridae
Dryosauridae indet.1
Dryosauridae indet.1 Milner and Norman 1984 ornithopod
1Miles and Hamblin 1999; 2Saitta 2015; 3Turner and Peterson 1999