JWHall #217, Brown Co., MN (Cretaceous of the United States)

Where: Brown County, Minnesota (44.2° N, 95.0° W)

• Paleocoordinates: 49.2° N, 50.2° W (Wright 2013)

• coordinate based on political unit

When: Ostrander Member (Windrow Formation), Cenomanian (100.5 - 93.9 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "channel"

• This sample comes from reworked material which filled a Cretaceous stream that cut through the Northwest corner of nonmarine lacustrine and lignite deposits.
• Typical Ostrander deposits occur to the East and consists of fine-grained, loosely consolidated gravels. The local deposits are mostly nonmarine fluvial, lacustrine, and deltaic origins.

Size class: microfossils

Preservation: original sporopollenin

Collection methods: bulk, chemical, sieve,

• Samples were processed and picked.

Primary reference: J. W. Hall and N. M. Peake. 1968. Megaspore assemblages in the Cretaceous of Minnesota. Micropaleontology 14(4):456-464 [R. Lupia/T. Naeher/T. Naeher]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 31951: authorized by Rick Lupia, entered by Tiffany Naeher on 29.05.2003

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Terebratulida - Terebrataliidae
"Thomsonia dakotaensis" = Coptothyris
"Thomsonia dakotaensis" = Coptothyris
Pteridopsida
 Marsileales -
Arcellites disciformis
unclassified
  -
Tracheophyta indet.
Tracheophyta indet.
unassignable "endospores" of various lycopsid and fern taxa
Marchantiopsida
  - Marchantiidae
Costatheca sp.
Costatheca sp. Hall 1967
Lycopodiopsida
 Isoetales -
Minerisporites mirabilis
Spermatites
  -
Spermatites sp.
Spermatites sp. Miner 1935
Tenellisporites
  -
Tenellisporites spinatus