chemical fossil
chemical fossil Any of various organic compounds found in ancient geological strata that appear to be biological in origin and are assumed to indicate that life existed when the rocks were formed. The presence of chemical fossils in Archaean strata indicates that life existed over 3500 million years ago, perhaps even as much as 3800 million years ago.
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Sterling Chemicals Inc , Sterling Chemicals, Inc.
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Web site: http://… Chemicals , The general public often construes the word "chemical" to mean a harmful synthetic substance. In fact, however, the term applies to any element or co… Chemical Synthesis , Synthesis, Chemical
Chemical synthesis is the preparation of a compound, usually an organic compound, from easily available or inexpensive commercial… Insecticides , insecticides, chemical, biological, or other agents used to destroy insect pests; the term commonly refers to chemical agents only.
Chemical Insectic… Toxicology , Toxicology is the scientific study of poisons (toxins). Major topics in toxicology include the detection and chemical analysis of poisons, the study… • symb. the chemical element lutetium. , Lu • symb. the chemical element lutetium.
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chemical fossil