Jansen Creek Mbr, Makah Fm - Jansen Creek: Rupelian, Washington

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polyplacophora - Chitonida - Ischnochitonidae
Dell'Angelo et al. 2011 1 specimen
Scaphopoda - Dentaliida - Dentaliidae
Bivalvia - Mytilida - Crenellidae
? Crenella sp. Brown 1827
Bivalvia - Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758
Bivalvia - Lucinida - Lucinidae
Bivalvia - Lucinida - Thyasiridae
Bivalvia - Cardiida - Cardiidae
Bivalvia - Carditida - Carditidae
Gastropoda - Epitoniidae
Listed as "Acrilla n. sp. ? aff. A. olympicensis
Gastropoda - Neogastropoda - Fasciolariidae
Gastropoda - Naticidae
Naticidae indet. Guilding 1834
Gastropoda - Turritellidae
Malacostraca - Decapoda - Paguridae
Schweitzer and Feldmann 2001
Reptilia - Suliformes - Plotopteridae
Mayr and Goedert 2016 1 specimen
precise locality information not listed for this occurrence
Dyke et al. 2011 1 specimen
Mayr and Goedert 2016
precise locality information not listed for this occurrence
Mayr and Goedert 2016 1 specimen
precise locality information not listed for this occurrence
Reptilia - Pelecaniformes
Mayr and Goedert 2018 1 specimen
see common names

Geography
Country:United States State/province:Washington County:Clallam
Coordinates: 48.3° North, 124.5° West (view map)
Paleocoordinates:53.5° North, 106.9° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Paleogene Epoch: Oligocene
Stage: Rupelian 10 m.y. bin: Cenozoic 4
Key time interval: Rupelian
Age range of interval: 33.9 - 27.3 m.y. ago
Stratigraphy
Formation:Makah Member:Jansen Creek
Local section:Jansen Creek Local bed:Clallam
Regional section:Clallam Regional bed:Clallam
Stratigraphic resolution:member
Stratigraphy comments: STRATIGRAPHIC RELATIONS: The Makah Fm is in the upper part of a middle Eocene to lower Miocene sequence of marine sedimentary sequence that is more than 6000 m thick. The Makah Fm overlies the upper Eocene Hoko River Fm. The Makah Fm underlies the upper Oligocene and lower Miocene Pysht Fm. The Jansen Mbr occurs about 1600 m through the 2800 m thick Makah Fm, between the Third Beach and Falls Creek Mbrs. AGE: Addicott (written communs., 1973-1977) assigns a late Eocene age (Lincoln Stage of Weaver 1937) to this collection. Foraminiferal assemblages indicate a Refugian (Late Eocene) age, a Lincoln equivalent. More recent workers (e.g. Goedert et al. 1995) assign an Oligocene (Rupelian-Chattian) age for the unit. An older (more conservative) Rupelian age is assigned here. STRATIGRAPHIC POSITION: From Jansen Creek Mbr is approximately 200 m thick, but it is not clear where in this succession the collection is derived from.
Lithology and environment
Primary lithology:volcaniclastic,shelly/skeletal poorly lithified sandstone
Secondary lithology:volcaniclastic,shelly/skeletal conglomerate
Includes fossils?Y
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Olistostromal blocks of shallow-water basaltic sandstone and conglomerate; interbedded fossiliferous basaltic sandstone and pebble conglomerate. LITHIFICATION: Assumed to be poorly lithified-lithified based on photographic plates of outcrop exposures.
Environment:deep-water indet.
Geology comments: ENVIRONMENT: Addicott (written communs., 1973-1977) suggested a middle-outer sublittoral environment of deposition. Foraminiferal assemblages indicate a shallow-water depositional environment. This unit is underlain and overlain by lower to middle bathyal sediments, supporting the interpretation that the shallow-marine sediments are allocthonous deposits derived from uplifted older strata along an ancient narrow shelf that borded the deep marginal basin of the Makah. These shallow-water deposits were transported into the deep marginal basin by a large submarine slide.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:USNM
Collection method comments: COLLECTOR: W. Addicott (1973-1977). REPOSITORY: Presumed to be USGS, and USNM.
Taxonomic list comments:COMPLETENESS: Probably not exhaustive, but representative. NOMENCLATURE: Not an authoritative publication, although list is cited to have been identified by Addicott and is reliable. Nomenclature is reasonably modern and carries species-level assignments.
Metadata
Database number:62246
Authorizer:A. Hendy, M. Uhen, W. Kiessling Enterer:A. Hendy, M. Krause, M. Uhen
Modifier:M. Uhen Research group:marine invertebrate
Created:2006-07-16 20:42:43 Last modified:2025-02-22 15:12:02
Access level:authorizer only Released:2007-01-16 20:42:43
Creative Commons license:CC0
Reference information

Primary reference:
17988. P. D. Snavely, Jr, A. R. Niem, N. S. Macleod, J. E. Pearl, and W. W. Rau. 1980. Makah Formation - A deep-marginal-basin sequence of Late Eocene and Oligocene age in the Northwestern Olympic Peninsula, Washington. United States Geological Survey Professional Paper 1162(B):1-28 [A. Miller/A. Hendy/M. Uhen]

Secondary references:

59810 B. Dell'Angelo, A. Bonfitto, and M. Taviani. 2011. Chitons (Polyplacophora) from Paleogene Strata in Western Washington State, U.S.A. Journal of Paleontology 85(5):936-954 [W. Kiessling/M. Krause]
38491 G. J. Dyke, X. Wong, and M. B. Habib. 2011. Fossil Plotopterid Seabirds from the Eo-Oligocene of the Olympic Peninsula (Washington State, USA): Descriptions and Functional Morphology. PLoS One 6(10) [M. Uhen/M. Uhen]
60404 G. Mayr and J. L. Goedert. 2016. New Late Eocene and Oligocene Remains of the Flightless, Penguin-Like Plotopterids (Aves, Plotopteridae) from Western Washington State, U.S.A. Journal of Vertebrate Paleontology 36(4):e1163573 [M. Uhen/M. Uhen]
65765 G. Mayr and J. L. Goedert. 2018. First record of a tarsometatarsus of Tonsala hildegardae (Plotopteridae) and other avian remains from the late Eocene/early Oligocene of Washington State (USA). Geobios 51:51-59 [M. Uhen/M. Uhen]
18061 E. A. Nesbitt. 2018. Cenozoic Marine Formations of Washington and Oregon: an annotated catalogue. PaleoBios 35:1-20 [M. Uhen/M. Uhen/M. Uhen]
33838 D. R. Prothero, E. Draus, and C. Burns. 2009. Magnetostratigraphy and Tectonic Rotation of the Eocene-Oligocene Makah and Hoko River Formations, Northwest Washington, USA. International Journal of Geophysics 2009(930612):1-15 [M. Uhen/M. Uhen/M. Uhen]
44923decapod C. E. Schweitzer and R. M. Feldmann. 2001. New Cretaceous and Tertiary decapod crustaceans from western North America. Bulletin of the Mizunami Fossil Museum 28:173-210 [C. Schweitzer/E. Johnson/M. Uhen]