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New Late Eocene mollusks from localized limestone deposits formed by subduction-related methane seeps, southwestern Washington

  • Richard L. Squires (a1) and James L. Goedert (a2)


The trochid archaeogastropod Margarites (Pupillaria) columbiana n. sp., the mytilid bivalve Modiolus (Modiolus) willapaensis n. sp., and the vesicomyid bivalve Calyptogena chinookensis n. sp. are described from the earliest known fossil communities associated with subduction-related methane seeps. The communities are in very localized limestones of late middle to late Eocene age along the southwestern margin of Washington. These limestones contain large numbers of chemosynthetic bivalves and worm tubes, as well as other macrobenthos, that colonized around cool-temperature methane seeps along the landward slopes of an ancient subduction-zone complex.

Calyptogena chinookensis n. the earliest known species of this genus, which was previously known from Miocene to Recent.



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Adams, H., and Adams, A. 1856. The Genera of Recent Mollusca; Arranged According to Their Organization. Vol. 2. John Van Voorst, London, 661 p.
Armentrout, J. M. 1967. The Tarheel and Empire Formations—geology and paleontology of the type sections, Coos Bay, Oregon. Unpubl. M.S. thesis, University of Oregon, Eugene, 155 p.
Armentrout, J. M., Hull, D. A., Beaulieu, J. D., and Rau, W. W. 1983. Correlation of Cenozoic stratigraphic units of western Oregon and Washington. Oregon Department of Geology and Mineral Industries, Oil and Gas Investigation 7, 90 p.
Boss, K. J., and Turner, R. D. 1980. The giant white clam from the Galapagos Rift, Calyptogena magnifica species novum. Malacologia, 20:161194.
Campbell, K. A. 1989. A Mio-Pliocene methane seep fauna and associated authigenic carbonates in shelf sediments of the Quinault Formation, SW Washington. Geological Society of America Abstracts with Programs, 21:A290.
Clark, B. L. 1925. Pelecypoda from the marine Oligocene of western North America. University of California, Bulletin of the Department of Geological Sciences, 15:69136.
Cuvier, G. L. 1798. Tableau elémentaire de l'histoire naturelle des animaux. Baudoni, Paris, 247 p.
Dall, W. H. 1891. On some new or interesting west American shells obtained from the dredgings of the U.S. Fish Commission steamer Albatross in 1888, and from other sources [Albatross Report]. U.S. National Museum Proceedings, 14:173191.
Dall, W. H. 1909. Contributions to the Tertiary paleontology of the Pacific coast. I. The Miocene of Astoria and Coos Bay, Oregon. U.S. Geological Survey Professional Paper 59, 278 p.
Dall, W. H., and Simpson, C. T. 1901. The Mollusca of Porto Rico. U.S. Fisheries Commission Bulletin, 20:351524.
Danner, W. R. 1966. Limestone resources of western Washington. Washington Division of Mines and Geology Bulletin, 52:1474.
DeLise, K. C. 1967. Biostratigraphy of the San Emigdio Formation, Kern County, California. University of California Publications in Geological Sciences, 68:167.
Durham, J. W. 1944. Megafaunal zones of the Oligocene of northwestern Washington. University of California Publications, Department of Geological Sciences Bulletin, 27:101212.
Férussac, A. E. 1822. Tableaux Systématiques des Animaux Mollusques. Paris, 111 p.
Goedert, J. L., and Squires, R. L. 1990. Eocene deep-sea communities in localized limestones formed by subduction-related methane seeps, southwestern Washington. Geology, 18:11821185.
Gould, A. A. 1849. On the shells collected by the United States Exploring Expedition. Boston Society of Natural History Proceedings, 3:8992.
Gray, J. E. 1847. The classification of the British Mollusca by W. E. Leach, 1818. Annals and Magazine of Natural History, 20:267273.
Hashimoto, J., Ohta, S., Tanaka, T., Hotta, H., Matsuzawa, S., and Sakai, H. 1989. Deep-sea communities dominated by the giant clam, Calyptogena soyoae, along the slope foot of Hatsushima Island, Sagami Bay, central Japan. Palaeogeography, Palaeoclimatology, Palaeoecology, 71:179192.
Hickman, C. J. S. 1969. The Oligocene marine molluscan fauna of the Eugene Formation in Oregon. University of Oregon Museum of Natural History Bulletin, 16:1112.
Hickman, C. J. S. 1980. Paleogene marine gastropods of the Keasey Formation in Oregon. Bulletins of American Paleontology, 78:1112.
Horikoshi, M. 1989. Hinge structures, their variations and changes during growth, of some Japanese deep-sea, giant white clams, Calyptogena, collected during the “Kaiko” Project. Palaeogeography, Palaeoclimatology, Palaeoecology, 71:137160.
Kanno, S., Amano, K., and Ban, H. 1989. Calyptogena (Calyptogena) pacifica Dall (Bivalvia) from the Neogene System in the Joetsu District, Niigata Prefecture. Transactions of the Proceedings of the Palaeontological Society of Japan, new series, 153:2535.
Keen, A. M. 1958. Marine Shells of Tropical West America. Stanford University Press, Stanford, California, 624 p.
Keen, A. M. 1969. Family Vesicomyidae Dall, 1908, p. N664. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Pt. N, Mollusca 6, Bivalvia, Vol. 2. Geological Society of America and University of Kansas Press, Lawrence.
Kulm, L. D., Suess, E., Moore, J. C., Carson, B., Lewis, B. T., Ritger, S. D., Kadko, D. C., Thornburg, T. M., Embley, R. W., Rugh, W. D., Massoth, G. J., Langseth, M. G., Cochrane, G. R., and Scamman, R. L. 1986. Oregon subduction zone: venting, fauna, and carbonates. Science, 231:561566.
Lamarck, J. B. P. A. 1799. Prodrome d'une nouvelle classification des coquilles. Société d'Histoire Naturelle de Paris Mémoire, 1:6391.
Linné, C. 1758. Systema Naturae per Regna Tria Naturae. Editio decima, reformata, Regnum Animale, Vol. 1. Holmiae, 1,327 p.
Moore, E. J. 1983. Tertiary marine pelecypods of California and Baja California: Nuculidae through Malleidae. U.S. Geological Survey Professional Paper 1228-A, 108 p.
Niitsuma, N., Matsushima, Y., and Hirata, D. 1989. Abyssal molluscan colony of Calyptogena in the Pliocene strata of the Miura Peninsula, central Japan. Palaeogeography, Palaeoclimatology, Palaeoecology, 71:193203.
Okada, H., and Bukry, D. 1980. Supplementary modification and introduction of code numbers to the low-latitude coccolith biostratigraphic zonation. Marine Micropaleontology, 5:321325.
Okutani, T., and Métivier, B. 1986. Descriptions of three new species of vesicomyid bivalves collected by the submersible Nautile from abyssal depths off Honshu, Japan. Venus (Japanese Journal of Malacology), 45:147160.
Phipps, C. J. 1774. A Voyage Towards the North Pole Undertaken by his Majesty's Command in 1773. London, 76 p.
Rafinesque, C. S. 1815. Analyse de la Nature; ou, Tableau de l'Universe et des Corps Organisés. Palermo, 224 p.
Rau, W. W. 1986. Geologic map of the Humptulips quadrangle and adjacent areas, Grays Harbor County, Washington. Washington State Department of Natural Resources Geologic Map, GM-33, scale 1:62,500.
Scopoli, J. A. 1777. Introductio ad Historiam Naturalem Sistentes Genera Lapidium, Plantarum et Animum. Vol. 6. Prague, 506 p.
Stoliczka, F. 1867–1868. Cretaceous fauna of southern India. Vol. 2. Gastropoda. Palaeontologia Indica, ser. 5, 2:1498.
Thiele, J. 1925. Gastropoden der deutschen Tiefsee-Expedition. II. Wissenschaftliche Evgebnisse der Deutschen Tiefsee-Expedition “Valdivia,” 17:35382.
Wagner, H. C. 1967. Preliminary geologic map of the Raymond quadrangle, Pacific County, Washington. U.S. Geological Survey Open-File Report 67-265, scale 1:62,500.
Weaver, C. E. 1943. Paleontology of the marine Tertiary formations of Oregon and Washington. University of Washington, Publications in Geology, 5:1789.
Wells, R. E. 1989. Geologic map of the Cape Disappointment–Naselle River area, Pacific and Wahkiakum Counties, Washington. U.S. Geological Survey Map I-1832, scale 1:62,500.

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New Late Eocene mollusks from localized limestone deposits formed by subduction-related methane seeps, southwestern Washington

  • Richard L. Squires (a1) and James L. Goedert (a2)


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