JMDMT #1111 Microfossils of Cyanobacteria in Carbonaceous Meteorites

The James M. DuPont Meteorite Collection - GCA, 56, 1673. [4] Lugmair G. W. et al. (1994) in Nuclei in the Cosmos III, eds. Busso M. et al, 591. [5] Wasserburg et al. (1994) Astrophys. J., 424, 412. [6] Clayton D. D. and Jin L. (1995) Astrophys. J., 451, 681. [7] Wadhwa M. and Lugmair G. W. (1996) Science., submitted. Mittlefehldt D. W.* Lindstrom M. M. Antarctic Stannern and Nuevo Laredo Trend Eucrites, Cumulates, and Others Eucrites are pigeonite-plagioclase basalts from an asteroidal source, likely 4 Vesta. Compared to terrestrial, lunar or martian basalts, eucrites are very uniform in composition, reflecting simpler and less extensive magmatic processes on their parent asteroid. Petrogenetic models for eucrites suffer from having too narrow a range of compositions as input