| unmineralized fossil bacteria. | unmineralized bacterial cells, mostly micrococcus sp., but including also streptococcus sp. and actinomyces sp., were found in enormous numbers in lake beds of the newark canyon formation of early cretaceous age, eureka county, nevada. the micrococci are black, and have an average diameter about 0.5 micro. similar black micrococci (0.4 to 0.7 micro) were found in profusion in the bottom mud of green lake, new york. about 80 percent of this mud consists of minute idiomorphic calcite crystals and ... | 1963 | 14043337 |