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By Gregory J. Retallack, Erick A. Bestland, Theodore J. Fremd

ISBN-10: 0813723442

ISBN-13: 9780813723440

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Extra info for Eocene and Oligocene Paleosols of Central Oregon (GSA Special Papers 344)

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Instead, we have chosen separate names for each kind of paleosol, each representing a different ancient environment. These have been named as pedotypes, that is, as recognizable kinds of paleosols (Appendix 1). Pedotype is a term coined to replace “paleosol series” (Retallack, 1990a), which has problematic alternative connotations in both geological and soil science (Retallack, 1994a). Pedotypes are generally named after localities, but many of the local place names are already in use for surface soil series, rock formations, and fossil localities.

Figure 40. 5 m in Fig. 33). Lithological key as for Figure 35. 5R3/8): indistinct relict bedding: very weakly calcareous. Further examples. Scat paleosols are common in the Clarno Nut Beds and in the conglomerates of the Palisades and of Hancock Canyon. Nine of them were found in the reference section below the Nut Beds (Figs. 3, 37, 41–44). Additional examples can be seen in volcanic mudflows forming cliffs facing the John Day River and Pine Creek (Fig. 45) south of Hancock Field Station. Here they have a distinctive greenish gray (5G5/2) color, which is probably truer to their unweathered color.

Retallack, E. A. Bestland, and T. J. Fremd Figure 39. View northwest to Black Spur (black plateau-forming basalt near skyline to right), looking across Nut Beds and Red Hill exposures of the Clarno Formation, near Clarno. Iron Mountain on the left skyline is Columbia River Basalt and white badlands in its footslopes are John Day Formation. Covered in clayey slopes below Black Spur is a succession beginning with the type Pswa paleosol developed on a dacite dome intrusion, then several Scat and Cmuk paleosols.

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Eocene and Oligocene Paleosols of Central Oregon (GSA Special Papers 344) by Gregory J. Retallack, Erick A. Bestland, Theodore J. Fremd


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