About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 30 (1946)

Issue: 1. (January)

First Page: 23

Last Page: 31

Title: Evolution of Reef Corals in East Indies Since Miocene Time

Author(s): J. H. F. Umbgrove (2)

Abstract:

Percentage figures of Upper Tertiary corals in the East Indies are useful as a method of stratigraphic dating and correlation. The percentage of still living species increases in the following order: Miocene 0 to 50, Pliocene 50 to 70, Pleistocene and Holocene 70 to 100. It is argued that the evolution of the reef corals may graphically be represented by a curved line showing two accelerations, one in the upper Miocene, another in the Pleistocene. The possible causes of these epochs of an accelerated evolution are discussed and a comparison is made with the evolution rate of the Mollusca, another group of amply studied marine invertebrates.

Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Protected Document: $10
Internal PDF Document: $14
Open PDF Document: $24

AAPG Member?

Please login with your Member username and password.

Members of AAPG receive access to the full AAPG Bulletin Archives as part of their membership. For more information, contact the AAPG Membership Department at [email protected].