Extinction how life on earth nearly ended 250 million years ago 由 Erwin, Douglas H. 1958-

Biostratigraphy microfossils and geological time 由 McGowran, Brian

Paleocene-Eocene stratigraphy and biotic change in the Bighorn and Clarks Fork basins, Wyoming

The terrestrial Eocene-Oligocene transition in North America

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Geochronology, time scales and global stratigraphic correlation. 由 Berggren, William A.

Graphic correlation.

Proceedings of the Fourth International Workshop on agglutinated foraminifera, Krak§ow, Poland, September 12-19, 1993

Plant fossils in geological investigation the palaeozoic. 由 Cleal, Christopher J.

Environments through time a laboratory manual in the interpretation of ancient sediments and organisms 由 Anstey, Robert L.

Time in stratigraphy. 由 Shaw, Alan B.