Locality 36 - Empire Fm (Pliocene of the United States)

Where: Coos County, Oregon (43.4° N, 124.3° W: paleocoordinates 43.3° N, 122.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Empire Formation, Early/Lower Pliocene (5.3 - 3.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Empire Fm, which is overlain by the Elk River Fm. THICKNESS: From bed within formation that reaches a thickness of 500 ft. AGE: Miocene according to Arnold and Hannibal (1913). More recent publications (Hertlein and Crickmay, 1925) indicate an Early Pliocene age. STRATIGRAPHIC POSITION: From shale (upper portion) within formation.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, silty sandstone

• ENVIRONMENT: Not stated, but appears to be shallow marine, siliciclastic.
• SPECIFIC LITHOLOGY: Shaly sandstone. LITHIFICATION: Poorly lithified, given facies description and age.

Size class: macrofossils

Collection methods: surface (in situ),

• COLLECTOR: H. Hannibal (c 1910's). REPOSITORY: Unknown, not stated.

Primary reference: R. Arnold and H. Hannibal. 1913. The marine Tertiary stratigraphy of the North Pacific coast of America. Proceedings of the American Philosophical Society 52(212):559-605 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 71148: authorized by Austin Hendy, entered by Austin Hendy on 20.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia, gastropoda, scaphopoda, brachiopoda and echinodermata. NOMENCLATURE: Not an authoritative publication, and antiquated nomenclature, but with species-level assignments.
Scaphopoda
 Dentaliida - Rhabdidae
"Dentalium rectius" = Rhabdus rectius
"Dentalium rectius" = Rhabdus rectius Carpenter 1864 tusk shell
Bivalvia
 Pectinida - Pectinoidae
"Pecten coosensis" = Lituyapecten coosensis
"Pecten coosensis" = Lituyapecten coosensis Shumard 1858 scallop
 Thraciida - Thraciidae
"Thracia trapezoidea" = Thracia (Homoeodesma) trapezoides
"Thracia trapezoidea" = Thracia (Homoeodesma) trapezoides Conrad 1849 clam
 Solenida - Solenidae
Solen sicarius Gould 1850 clam
 Pholadida - Myidae
"Mya truncata" = Mya (Mya) truncata
"Mya truncata" = Mya (Mya) truncata Linnaeus 1758 softshell clam
 Cardiida - Cardiidae
"Cardium meekianum" = Clinocardium (Clinocardium) meekianum Gabb 1866 cockle
Cardium coosense Dall 1909 cockle
 Cardiida - Tellinidae
"Macoma calcarea" = Macoma (Macoma) calcarea
"Macoma calcarea" = Macoma (Macoma) calcarea Gmelin 1792 tellin clam
 Cardiida - Veneridae
"Paphia stayleyi" = Leukoma staleyi, "Marcia oregonensis" = Katherinella arnoldi
"Paphia stayleyi" = Leukoma staleyi Gabb 1866 venus clam
"Marcia oregonensis" = Katherinella arnoldi Weaver 1916 venus clam
 Cardiida - Mactridae
"Spisula albaria" = Mactromeris albaria
"Spisula albaria" = Mactromeris albaria Conrad 1848 clam
 Nuculanida - Yoldiidae
"Yoldia strigata" = Yoldia (Cnesterium) aeolica Valenciennes 1846 clam
Yoldia impressa Conrad 1849 clam
Gastropoda
 Trochoidea - Tegulidae
 Trochoidea - Trochidae
 Pseudomelanoidea - Pseudomelaniidae
"Turris perversa" = Spirotropis (Antiplanes) perversa Gabb 1865 snail
 Neotaenioglossa - Calyptraeidae
Calyptraea inornata Gabb 1869 slipper shell
 Sorbeoconcha - Cassidae
Phalium aequisulcatum Dall 1909 snail
Phalium turricula Dall 1909 snail
 Sorbeoconcha - Ranellidae
Cymatium pacificum triton shell
 Neogastropoda - Turridae
 Neogastropoda - Borsoniidae
 Neogastropoda - Fasciolariidae
 Neogastropoda - Buccinidae
 Neogastropoda - Olividae
"Olivella pedroana" = Callianax pedroana
"Olivella pedroana" = Callianax pedroana Conrad 1855 olive snail
 Neogastropoda - Muricidae
Boreotrophon stuarti Smith 1880 murex snail
"Chrysodomus imperialis" = Thais (Stramonita) imperialis Dall 1908 murex snail
 Sorbeoconcha - Naticidae
"Natica clausa" = Cryptonatica affinis, "Ampullina oregonensis" = Cryptonatica oregonensis, Polinices galianoi
"Natica clausa" = Cryptonatica affinis Gmelin 1791 moon snail
"Ampullina oregonensis" = Cryptonatica oregonensis Conrad 1865 moon snail
Polinices galianoi Dall 1909 moon snail