ENVS 1050 Lecture Notes - Lecture 6: Diagenesis, Lithification, Clastic Rock
21 Mar 2016
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Document Summary
Sediment loose (unconsolidated) solid particles that originate from: Sediment is classified and defined by grain size. Sorting: selected and separated according to grain size. When sediment comes to rest or settle out of suspension or solution. Depends on environment of deposition and subsequent processes of erosion, tectonism, diagenesis etc. Diagenesis the physical and chemical changes occurring during the conversion of sediment to sedimentary rock. How does a sediment become rock: lithification process that converts loose sediment into sedimentary rock. Most sedimentary rocks are clastic, rather than crystalline in texture. Breccia: angular gravel, often found it fans in mountainous regions, not far travelled. Conglomerate: rounded gravel, often found on breaches and in rivers. Very common, wide variety of shape, sorting and mineral composition. Formations: thick body of rock that is distinguishable from adjacent units of rock and that is extensive. Contacts: boundary surface between two units of rock, also known as the bedding plane.
