JMDMT #1504 Microfossils of Cyanobacteria in Carbonaceous Meteorites

The James M. DuPont Meteorite Collection - dark. If this is not the result of complete fragmentation of RP chondrules, it may signify that the chondrule population in Leighton dark differs from that in normal H-group chondrites. Although we have not yet sampled cryptocrystalline chondrules, some are present in our section. References: [1] Olsen E. J. et al. (1990) Meteoritics, 25, 187-194. [2] Bunch T. E. and Rajan R. S. (1988) in Meteorites and the Early Solar System, Tucson, University of Arizona Press, 144-164. [3] McSween H. Y. Jr, et al. (1981) Proc. LPS 12B, 1093-1103. [4]Gooding J. L. and Keil K. (1980) Meteoritics, 16, 17-43. Lofgren G. E.* Chondrule Precursor Aggregates in UOCs Lofgren [1] proposed a model for the origin of chondrules based on dynamic crystallization