2009年3月26日 23:02:56
allostratigraphic units:Allogroups, alloformations, and allomembers; these are subdivisions of sedimentary structures that are the subject of allostratigraphy.
http://www.encyclopedia.com/doc/1O13-allostratigraphicunits.html


allostratigraphy: The study of sedimentary strata that can be defined and identified from the discontinuities bounding them, and that can be mapped.
http://www.encyclopedia.com/doc/1O13-allostratigraphy.html

From: A Dictionary of Earth Sciences | Date: 1999 | Author: AILSA ALLABY and MICHAEL
Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999.