Pacific Northwest Tertiary benthic foraminiferal biostratigraphic framework—An overview

Rau, W.W.

doi:10.1130/spe184-p67

Cited by 20 publications

(19 citation statements)

References 8 publications

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“…Addicott (1976) correlated the Yaquina Formation in the Newport Embayment with his Juanian provincial molluscan stage and with the Vaqueros provincial molluscan stage of California. Rau (1981) reported benthic foraminifers from the Yaquina Formation that were correlative with the Zemorrian provincial benthic foraminifer stage of Kleinpell (1938). Armentrout (1981) citing C. A. Repenning (pers.…”

Section: Location Stratigraphy and Correlationmentioning

confidence: 99%

Skull anatomy of the Oligocene toothed mysticeteAetioceus weltoni(Mammalia; Cetacea): implications for mysticete evolution and functional anatomy

Deméré¹,

Berta²

2008

Zoological Journal of the Linnean Society

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Toothed mysticetes of the family Aetiocetidae from Oligocene rocks of the North Pacific play a key role in interpretations of cetacean evolution because they are transitional in grade between dorudontine archaeocetes and edentulous mysticetes. The holotype skull of Aetiocetus weltoni from the late Oligocene (28–24 Ma) of Oregon, USA, has been further prepared, revealing additional morphological features of the basicranium, rostrum and dentary that have important implications for mysticete evolution and functional anatomy. The palate of Aetiocetus weltoni preserves diminutive lateral palatal foramina and associated delicate sulci which appear to be homologous with the prominent palatal foramina and sulci that occur along the lateral portion of the palate in extant mysticetes. In modern baleen whales these foramina allow passage of branches of the superior alveolar artery, which supplies blood to the epithelia of the developing baleen racks. As homologous structures, the lateral palatal foramina of A. weltoni suggest that baleen was present in this Oligocene toothed mysticete. Cladistic analysis of 46 cranial and dental characters supports monophyly of the Aetiocetidae, with toothed mysticetes Janjucetus and Mammalodon positioned as successive sister taxa. Morawanacetus is the earliest diverging aetiocetid with Chonecetus as sister taxon to Aetiocetus species. © 2008 The Linnean Society of London, Zoological Journal of the Linnean Society, 2008, 154, 308–352.

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Section: Location Stratigraphy and Correlationmentioning

confidence: 99%

Skull anatomy of the Oligocene toothed mysticeteAetioceus weltoni(Mammalia; Cetacea): implications for mysticete evolution and functional anatomy

Deméré¹,

Berta²

2008

Zoological Journal of the Linnean Society

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“…We strongly recommend that readers check and independently evaluate the source reference before citing any information included in this report Post-1981 Berggren and others (1985) 2 after Armentrout (1981) 3 after Rau (1981) 4 Foraminiferal stages of the Pleistocene include the Hallian and underlying Wheelerian. (from Rau, 1981) 5 after "Mallory emended" in Almgren and others (1988) 6 modified by Prothero and Armentrout (1985) 7 after Addicott (1981) 8 after Snavely and others (1969) and Addicott (1976) 9 after Bukry (1981) Figure 1 Correlation of relative and absolute time-scales for Cenozoic rocks in southwestern Washington and northwestern Oregon. foraminifers; diagnostic Saucesian benthonic foraminiferal assemblage.…”

Section: Datesmentioning

confidence: 99%

“…A. caltfornica Zone was renamed Bulimina cf. B. jacksonensis Zone (see Rau, 1981 (Rau and others, 1983).…”

mentioning

confidence: 99%

Ages of rocks in southwestern Washington and northwestern Oregon as indicated by paleontological and isotopic dates

Niem¹,

Niem²

1992

Open-File Report

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This report presents a compilation of 1,019 paleontologic dates and 301 isotopic dates of rocks in southwestern Washington and northwestern Oregon. The study area extends from Portland, Oregon (latitude 45°30' N.) to Bellevue, Washington (latitude 47°35f N.) and from the east flank of the Cascade Range (longitude 121°20f W.) to the coastline (longitude approximately 124°00f W.). The data are presented in two tables and come from previous summaries of isotopic ages, open-file reports, published papers and maps, and theses. Parke D. Snavely, Jr. of the U.S. Geological Survey and Weldon W. Rau of the Washington Division of Geology and Earth Resources (WDGER) generously allowed us access to files and records of more than 40 years of micropaleontological research in western Washington and Oregon. We also present unpublished data from our research since 1971 in northwestern Oregon. This compilation was undertaken for the southwestern Washington and northwestern Oregon project of the U.S. Geological Survey Evolution of Sedimentary Basins Program. Data compilation was completed in only three months and, therefore, some available data may have been overlooked. We would appreciate being contacted about omissions through:

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“…Ages for 11 whole rock samples from the basalt of Cascade Head range from ?Q.5±0.6 to 33.0+0.7 Ma. Most conventional K-Ar ages cluster between 30 to 32 Ma, which is too young when compared to the paleontological ages obtained for microfossils in the interbedded siltstone of the Nestucca Formation (Rau, 1981;Bukry and Snavely, 1988). Conventional KAr ages of plagioclase and hornblende separates from the trachyandesite dike (S 84-114) yielded slightly older ages of 34.0±1.0 and 33.9±0.8 Ma, respectively.…”

Section: Basalt Of Cascade Headmentioning

confidence: 99%

Petrology of late Eocene lavas erupted in the forearc of central Oregon

Davis¹,

Snavely²,

Gray³

et al. 1995

Open-File Report

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Pacific Northwest Tertiary benthic foraminiferal biostratigraphic framework—An overview

Cited by 20 publications

References 8 publications

Skull anatomy of the Oligocene toothed mysticeteAetioceus weltoni(Mammalia; Cetacea): implications for mysticete evolution and functional anatomy

Skull anatomy of the Oligocene toothed mysticeteAetioceus weltoni(Mammalia; Cetacea): implications for mysticete evolution and functional anatomy

Ages of rocks in southwestern Washington and northwestern Oregon as indicated by paleontological and isotopic dates

Petrology of late Eocene lavas erupted in the forearc of central Oregon

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