Howe-Stephens Quarry (Jurassic of the United States)

Also known as Sauriermuseum

Where: Big Horn County, Wyoming (44.7° N, 107.8° W: paleocoordinates 39.8° N, 52.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• lower or middle part of formation (below "clay change"), 10 m above Howe Q

• bed-level stratigraphic resolution

Environment/lithology: fine channel fill; fine-grained sandstone and gray mudstone

• poorly drained floodplain environment
• "fine-grained fluvial sandstone exhibiting cross-bedding in some layers"

Size class: macrofossils

Preservation: mold/impression, soft parts, original phosphate, replaced with silica

Collected by H.-J. Siber in 1992-

Collection methods: quarrying, mechanical,

Primary reference: J. Ayer. 1999. The Howe Ranch Dinosaurs: 10 Years of Dinosaur Digging in Wyoming. Sauriermuseum, Aathal, Switzerland 1-95 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 46465: authorized by Matthew Carrano, entered by Matthew Carrano on 13.01.2005, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

 Dipnoi -
Dipnoi indet. Müller 1884 lungfish
 Saurischia - Diplodocidae
Barosaurus sp.4 Marsh 1890 diplodocine
Diplodocus sp. Marsh 1878 diplodocine
"Brösmeli", "Twin", "Triplo", "Dino Quattro", "Aurora", "XL" (incl. SMA HQ2)
cf. Apatosaurus sp.3 Marsh 1877 diplodocid
"Max"; SMA 0014
 Saurischia - Camarasauridae
Camarasaurus sp. Cope 1877 camarasaurid
"E.T."; SMA 0002
 Saurischia - Brachiosauridae
Brachiosaurus sp.1 Riggs 1903 brachiosaurid
SMA 0009, "Toni"
 Avetheropoda - Allosauridae
Allosaurus sp. Marsh 1877 allosaurid
"Big Al Two"
 Ornithischia - Stegosauridae
Hesperosaurus mjosi2 Carpenter et al. 2001 ornithischian
SMA 0018, "Victoria"; SMA 092, "Lilly"; SMA 3074-FV01, "Moritz"
Stegosaurus sp. Marsh 1877 ornithischian
 Neornithischia -
Othnielosaurus sp.2 Galton 2007 ornithischian
"Minimax", "Piccolo"
 Neornithischia - Dryosauridae
Dryosaurus sp. Marsh 1894 bird foot dinosaur
 Pinales - Araucariaceae
Araucaria sp. de Jussieu 1789