The best section representing the eocene/oligocene boundary in japan

Kunio Kaiho; Hisatake Okada; Yokichi Takayanagi

doi:10.1016/S0920-5446(08)70113-4

The best section representing the eocene/oligocene boundary in japan

Kunio Kaiho, Hisatake Okada, Yokichi Takayanagi

SCI - Earth Science

Research output: Contribution to journal › Article › peer-review

Abstract

The best section containing the Eocene–Oligocene boundary in Japan is a composite section exposed along the course of Kumanosawa and Yubari River in the Yubari area, central Hokkaido. The Kumanosawa section represents the upper portion of the Poronai Formation whereas the Yubari River section comprises the top level of the Poronai Formation and the conformably overlying Momijiyama Formation. The sequence is generally homoclinal with variable dips of between 12° and 60° and seems to represent a shallowing facies in a somewhat restricted inland basin of middle bathyal to outer neritic environments. This sequence is rich in molluscs, crustaceans, and benthic foraminifers whereas planktonic microfossils are rather scarce.

Original language	English
Pages (from-to)	159-160
Number of pages	2
Journal	Developments in Palaeontology and Stratigraphy
Volume	9
Issue number	C
DOIs	https://doi.org/10.1016/S0920-5446(08)70113-4
Publication status	Published - 1986 Jan

ASJC Scopus subject areas

Stratigraphy
Palaeontology

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10.1016/S0920-5446(08)70113-4

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abstract = "The best section containing the Eocene–Oligocene boundary in Japan is a composite section exposed along the course of Kumanosawa and Yubari River in the Yubari area, central Hokkaido. The Kumanosawa section represents the upper portion of the Poronai Formation whereas the Yubari River section comprises the top level of the Poronai Formation and the conformably overlying Momijiyama Formation. The sequence is generally homoclinal with variable dips of between 12° and 60° and seems to represent a shallowing facies in a somewhat restricted inland basin of middle bathyal to outer neritic environments. This sequence is rich in molluscs, crustaceans, and benthic foraminifers whereas planktonic microfossils are rather scarce.",

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AU - Kaiho, Kunio

AU - Okada, Hisatake

AU - Takayanagi, Yokichi

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AB - The best section containing the Eocene–Oligocene boundary in Japan is a composite section exposed along the course of Kumanosawa and Yubari River in the Yubari area, central Hokkaido. The Kumanosawa section represents the upper portion of the Poronai Formation whereas the Yubari River section comprises the top level of the Poronai Formation and the conformably overlying Momijiyama Formation. The sequence is generally homoclinal with variable dips of between 12° and 60° and seems to represent a shallowing facies in a somewhat restricted inland basin of middle bathyal to outer neritic environments. This sequence is rich in molluscs, crustaceans, and benthic foraminifers whereas planktonic microfossils are rather scarce.

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The best section representing the eocene/oligocene boundary in japan

Abstract

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