Jansen Creek, northwest: Rupelian, Washington

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Mytilida - Mytilidae
Bivalvia - Cardiida - Vesicomyidae
Kiel et al. 2023
Gastropoda - Opisthobranchiata - Limacinidae
Limacina sp. Bosc 1817
Squires et al. 1999
sp. 1
Malacostraca - Decapoda - Munididae
Nyborg and Garassino 2015
Phaeophyceae - Laminariales
Kiel et al. 2024
kelp holdfasts
see common names

Geography
Country:United States State/province:Washington County:Clallam
Coordinates: 48.3° North, 124.5° West (view map)
Paleocoordinates:53.4° North, 107.4° 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
Stratigraphic resolution:member
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
Reason for describing collection:biostratigraphic analysis
Museum repositories:USNM
Metadata
Also known as:LACMIP 17101
Database number:205194
Authorizer:M. Uhen Enterer:M. Uhen
Research group:marine invertebrate
Created:2019-10-08 13:20:15 Last modified:2025-02-22 15:12:02
Access level:the public Released:2019-10-08 13:20:15
Creative Commons license:CC0
Reference information

Primary reference:
70408. S. Kiel and K. Amano. 2013. The earliest bathymodiolin mussels: An Evaluatio of Eocene and Oligocene taxa from deep-sea methane seep deposits in Western Washington State. Journal of Paleontology 87(4):589-602 [M. Uhen/M. Uhen]

Secondary references:

88342 S. Kiel, K. Amano, and J. L. Goedert. 2023. New taxa, records, and data for vesicomyid bivalves from Cenozoic strata of the North Pacific region. Acta Palaeontologica Polonica 68(2):297-320 [M. Uhen/M. Uhen]
87324 S. Kiel, J. L. Goedert, T. L. Hyunh, M. Krings, D. Parkinson, R. Romero, and C. V. Looy. 2024. Early Oligocene kelp holdfasts and stepwise evolution of the kelp ecosystem in the North Pacific. Proceedings of the National Academey of Sciences 121(4):e231705412 [M. Uhen/M. Uhen]
70553 T. Nyborg and A. Garassino. 2015. New fossil squat lobsters (Crustacea: Anomura: Munididae) from the Eastern Pacific. Palaeodiversity 8:95-101 [M. Uhen/M. Uhen]
70508 R. L. Squires, J. L. Goedert, and S. R. Benham. 1999. First fossil record of the pteropod Limacina from the Pacific Coast of North America. Bulletin of the Southern California Academy of Sciences 98(2):80-89 [M. Uhen/M. Uhen/M. Uhen]