Almont (Paleocene of the United States)

Also known as ETE Locality 180, Almont,

Where: Morton County, North Dakota (46.9° N, 101.4° W: paleocoordinates 51.1° N, 81.3° W)

• outcrop-level geographic resolution

When: Sentinel Butte Member (Fort Union Formation), Clarkforkian (56.8 - 55.8 Ma)

• ETE dating method: time_unit, ETE age comment: .

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; lithified, brown, yellow, cherty/siliceous shale

Size class: macrofossils

Preservation: mold/impression, permineralized, replaced with silica

Collection methods: quarrying,

• ETE Size: .; ETE reference list: 122, 121, 88, ; ETE museum list:

Primary reference: P. R. Crane, S. R. Manchester, and D. L. Dilcher. 1990. A Preliminary Survey of Fossil Leaves and Well-Preserved Reproductive Structures from the Sentinel Butte Formation (Paleocene) near Almont, North Dakota. Fieldiana, Geology, New Series 20 [S. Wing/S. Wing/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 21372: authorized by Scott Wing, entered by Scott Wing on 14.10.1992, edited by John Alroy, Hallie Sims, Hongshan Wang and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• Relative abundance: abundant (>120 specimens), very common (60 - 90), common (30 - 59), occasional (16 - 29), rare (6 - 15), very rare (1 - 5).
unclassified
  -
Meliosoma rostellata
fruits (occasional)
Angiospermeae "head of tricarpellate fruits"
heads (occasional), individual fruits (very common)
Ginkgoopsida
 Ginkgoales - Ginkgoaceae
Ginkgo adiantoides Unger 1845 ginkgo
leaves (very common), seeds (common)
Angiospermae
 Oxalidales - Oxalidaceae
Averrhoites affinis Newberry 1868 wood sorrel
rare
 Fagales - Juglandaceae
Cyclocarya brownii
fruits (abundant), leaves (occasional)
Dicotyledoneae
 Myrtales - Myrtaceae
? Psidium sp. Linnaeus 1753 guava
fruits + seeds (occasional)
Angiospermae
 Cornales - Cornaceae
Nyssidium articum
follicles (rare), leaves (very rare), staminate inflorescences (very rare)
Cornus sp. Linnaeus 1753 dogwood
rare
 Icacinales - Icacinaceae
Palaeophytocrene sp. Reid and Chandler 1933 white pear
fruits (very rare)
 Dipsacales - Caprifoliaceae
cf. Viburnum antiquum Newberry 1868 honeysuckle
common
 Trochodendrales - Trochodendraceae
Nordenskioldia borealis Heer 1870
fruits (occasional), dispersed achenes (very common), leaves (abundant)
Nordenskioldia borealis1 Heer 1870
Emend
 Ranunculales - Menispermaceae
Canticocculus sp. Chandler 1961
fruits (very rare)
 Proteales - Platanaceae
Platanaceae "Leaf type A" Lestiboudois 1826
rare
Platanaceae "Leaf type B" Lestiboudois 1826
rare
Platanaceae "Leaf type C" Lestiboudois 1826
rare
Platanaceae "Staminate inflorescences" Lestiboudois 1826
very rare
Platanaceae "infructescences" Lestiboudois 1826
occasional
 Mesangiosperms - Araceae
Porosia verrucosa Lesquereux 1878
occasional
 Monocotyledoneae -
Pinopsida
 Pinales - Taxodiaceae
cf. Parataxodium sp. Arnold and Lowther 1955
leafy shoots (common), ovulate cones (occasional), pollen cones (common), seeds (rare)
Amphibia
 Caudata - Urodela
Urodela indet.2 salamander
Actinopteri
 Teleostei -
Joffrichthys triangulpterus n. sp.3 Newbrey and Bozek 2000
osteoglossid fish
 Life -
Palaeocarpinus sp. Crane 1981
infructescences + fruits (abundant), staminate inflorescences (common), leaves (abundant)