scholarly journals Catshark egg capsules from a Late Eocene deep-water methane-seep deposit in western Washington State, USA

2011 ◽  
Author(s):  
Steffen Kiel
Keyword(s):  
Deep Water ◽  
Late Eocene ◽  
Washington State ◽  
Methane Seep ◽  
Egg Capsules ◽  
Western Washington

The earliest bathymodiolin mussels: an evaluation of Eocene and Oligocene taxa from deep-sea methane seep deposits in western Washington State, USA

2013 ◽  
Vol 87 (4) ◽  
pp. 589-602 ◽  
Author(s):  
Steffen Kiel ◽  
Kazutaka Amano
Keyword(s):  
Deep Water ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Middle Eocene ◽  
Late Eocene ◽  
Washington State ◽  
Methane Seep ◽  
Fossil Species ◽  
Early Oligocene ◽  
Western Washington

Bathymodiolin mussels are a group of bivalves associated with deep-sea hydrothermal vents and other reducing deep-sea habitats, and they have a particularly rich early Cenozoic fossil record in western Washington State, U.S.A. Here we recognize six species from middle Eocene to latest Oligocene deep-water methane seep deposits in western Washington. Two of them are new: Vulcanidas? goederti from the middle Eocene Humptulips Formation and Bathymodiolus (sensu lato) satsopensis from the late Oligocene part of the Lincoln Creek Formation. Very similar to the latter but more elongate are specimens from the early Oligocene Jansen Creek Member of the Makah Formation and are identified as B. (s.l.) aff. satsopensis. Bathymodiolus (s.l.) inouei Amano and Jenkins, 2011 is reported from the Lincoln Creek Formation. Idas? olympicus Kiel and Goedert, 2007 was previously known from late Eocene to Oligocene whale and wood falls in western Washington and is here reported from Oligocene seep deposits of the Makah and Pysht Formations. Vulcanidas? goederti occurs at a seep deposit from a paleodepth possibly as great as 2000 m, suggesting that its living relative, Vulcanidas insolatus Cosel and Marshall, 2010, which lives at depths of only 150–500 m, is derived from a deep-water ancestor. The bathymodiolins in western Washington indicate that the group originated at least in the middle Eocene and underwent a first diversification in the late Eocene to Oligocene. Early ontogenetic shells of all fossil species investigated so far, including the middle Eocene Vulcanidas? goederti, reflect planktotrophic larval development indicating that this developmental mode is an ancestral trait of bathymodiolins.

The Late Eocene ‘Whiskey Creek’ methane-seep deposit (western Washington State)

Facies ◽  
2003 ◽  
Vol 48 (1) ◽  
pp. 241-253 ◽  
Author(s):  
Jörn Peckmann ◽  
James L. Goedert ◽  
Till Heinrichs ◽  
Jochen Hoefs ◽  
Joachim Reitner
Keyword(s):  
Late Eocene ◽  
Washington State ◽  
Methane Seep ◽  
Western Washington

The Late Eocene ‘Whiskey Creek’ methane-seep deposit (western Washington State)

Facies ◽  
2003 ◽  
Vol 48 (1) ◽  
pp. 223-239 ◽  
Author(s):  
James L. Goedert ◽  
Volker Thiel ◽  
Oliver Schmale ◽  
Weldon W. Rau ◽  
Walter Michaelis ◽  
...  
Keyword(s):  
Late Eocene ◽  
Washington State ◽  
Methane Seep ◽  
Western Washington

A comprehensive approach to the study of methane-seep deposits from the Lincoln Creek Formation, western Washington State, USA

Sedimentology ◽  
2002 ◽  
Vol 49 (4) ◽  
pp. 855-873 ◽  
Author(s):  
J. Peckmann ◽  
J. L. Goedert ◽  
V. Thiel ◽  
W. Michaelis ◽  
J. Reitner
Keyword(s):  
Washington State ◽  
Comprehensive Approach ◽  
Methane Seep ◽  
Western Washington

New late Eocene and Oligocene plotopterid fossils from Washington State (USA), with a revision of “Tonsala” buchanani (Aves, Plotopteridae)

2021 ◽  
pp. 1-13
Author(s):  
Gerald Mayr ◽  
James L. Goedert
Keyword(s):  
North Pacific ◽  
Late Eocene ◽  
Current Data ◽  
Washington State ◽  
Kelp Forests ◽  
Sexually Dimorphic ◽  
Western North America ◽  
The North ◽  
Western Washington ◽  
The North Pacific

Abstract We report new specimens of the Plotopteridae from Washington State (USA), an area where these flightless seabirds underwent significant diversification during the late Eocene and Oligocene. To date, five plotopterid species from western Washington have been formally named. Specimens previously assigned to Tonsala buchanani Dyke, Wang, and Habib, 2011 belong to at least two, but probably even three, different species. One of these, the large-sized “Whiskey Creek specimen” from late Eocene deposits mapped as the Makah Formation, is the oldest known plotopterid and is here tentatively assigned to ?Klallamornis clarki Mayr and Goedert, 2016. Another specimen originally referred to T. buchanani is also likely to belong to a different species and is among the most substantial records for North American plotopterids. We formally transfer T. buchanani to the taxon Klallamornis and show that the only unambiguously identified specimen of the species—the holotype—is currently poorly diagnosed from Klallamornis abyssa Mayr and Goedert, 2016, which is from coeval strata of the Pysht Formation. Although the holotype of K. abyssa is larger than that of K. buchanani, there remains a possibility that plotopterids were sexually dimorphic in size. We describe the first ungual phalanx of a plotopterid, which is referred to K. buchanani, and report previously unknown elements of the large ?K. clarki and the first records of this species from the Lincoln Creek Formation. Current data indicate that plotopterids originated in the middle or late Eocene on islands off western North America, and we hypothesize that the radiation of these birds in the North Pacific Basin may have been related to the evolution of kelp forests.

Palaega goedertorum, a fossil isopod (Crustacea) from late Eocene to early Miocene rocks of Washington State

1989 ◽  
Vol 63 (1) ◽  
pp. 73-80 ◽  
Author(s):  
Robert W. Wieder ◽  
Rodney M. Feldmann
Keyword(s):  
New Species ◽  
Deep Water ◽  
Late Eocene ◽  
Washington State ◽  
The State ◽  
Early Miocene ◽  
Pacific Region ◽  
Extant Species ◽  
A New Species ◽  
Subjective Synonym

A new species of fossil isopod, Palaega goedertorum, is described from late Eocene to early Miocene rocks of the Twin River Group, the Astoria Formation, and unit B of Wolfe and McKee (1968) in the state of Washington. These fossil forms are similar to living forms referred to the genus Bathynomus A. Milne-Edwards, 1879; hence, Bathynomus is considered a junior subjective synonym of Palaega Woodward, 1870. Since extant species of Palaega are known only from bathyal habitats, these occurrences tend to corroborate the deep-water paleoenvironmental setting of these rock units. This is the first report of Palaega from the eastern Pacific region.

A new genus of cryptic lucinid? bivalve from Eocene cold seeps and turbidite-influenced mudstone, western Washington

1996 ◽  
Vol 70 (5) ◽  
pp. 788-794 ◽  
Author(s):  
Louella R. Saul ◽  
Richard L. Squires ◽  
James L. Goedert
Keyword(s):  
New Species ◽  
Deep Water ◽  
New Genus ◽  
Striated Muscle ◽  
Late Eocene ◽  
Cold Seep ◽  
Cold Seeps ◽  
Undescribed Species ◽  
The Family ◽  
Western Washington

Two previously undescribed species of Bivalvia of Eocene age are herein tentatively considered to belong to the family Lucinidae because of their ligament areas and elongated anterior adductor scars. Both species are elongate for a lucinid, have edentulous hinges, striated muscle scars, and are placed in the new genus Cryptolucina. Both are found in the Humptulips Formation of middle to late Eocene age in western Washington, and both Cryptolucina megadyseides new species and C. elassodyseides new species are associated with deep-water, cold-seep limestone. Cryptolucina megadyseides is also associated with turbiditic mudstone.

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