GEO 303 Lecture Notes - Lecture 12: Ammonia, Electric Spark, Archaea
Document Summary
Geo notes lecture 9: origin of life, chapter 12. Next lecture: fossils and earliest animals, start 13. Precambrian rock: located in the continental interior, precambrian rocks: either igneous or metamorphic, collecting evidence of early earth history. Conditions under which they form is like himalayans, lot of movement/mountain building. Precambrian shields are where we find ore minerals (gold, silver, aluminum metals). Rich in ore deposits (mining industry, not oil) Origin of life on earth: a modern scientific origin story requires. A reasonable mechanism for living things to originate by natural means. An explanation for the diversity and complexity of biological life on earth today: molecules of life. Minerals: crystalline solid with ordered, repeating arrangement of atoms. Living: long chains and complex arrangements of atoms. Primary protein structure: a sequence of a chain of amino acids. Dna: deoxyribonucleic acid double helix molecule discovered in 1953 by watson and crick.