Where: Clallam County, Washington (48.3° N, 124.5° W: paleocoordinates 48.1° N, 113.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Jansen Creek Member (Makah Formation), Bartonian to Bartonian (41.3 - 23.0 Ma)

• 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.

• member-level stratigraphic resolution

Environment/lithology: deep-water; poorly lithified, volcaniclastic, shelly/skeletal sandstone and volcaniclastic, shelly/skeletal conglomerate

Size class: macrofossils

Reposited in the USNM

• COLLECTOR: W. Addicott (1973-1977). REPOSITORY: Presumed to be USGS, and USNM.

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 62246: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2006, edited by Mark Uhen and Mihaela Krause

Creative Commons license: CC BY (attribution)