Chapter 10 DEPOSITIONAL ENVIRONMENTS PART I: GENERAL

Chapter 10 DEPOSITIONAL ENVIRONMENTS PART I: GENERAL 1. INTRODUCTION What does a sedimentologist mean by environment of deposition ? The concept is not as easy to define as you might think. Basically, what the conditions were at the site of deposition . This is usually viewed in terms of an overall geographical complex or entity that has a characteristic set of conditions, like a river or a beach but see below. The term environment is really used in two different ways: THE environment: the aggregate or complex of physical and/or chemical and/or biological conditions that exist or prevail at a given point or in a given local area at a given time or for a period of time. AN environment: a distinctive kind of geographic setting characterized by a distinctive set of physical and/or chemical and/or biological conditions.

during early diagenesis, get converted to hematite, provided that there is not so much organic matter to be oxidized that the iron ends up in the ferrous state. That’s far more likely to happen in nonmarine, especially fluvial, environments than in marine environments, so red beds are good suggestive evidence of nonmarine deposition.

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Tags:

  Deposition, Diagenesis, Depositional

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