Sedimentary Structures - Petrology

Explore sedimentary structures in this comprehensive petrology lecture. Delve into the classification of inorganic, primary (physical), secondary (chemical), and organic (biogenic) structures. Learn about bedding geometry, lamination, and the significance of various sedimentary features in determining paleoenvironments and flow directions. Discover how trace fossils can be used to define major facies belts and determine stratigraphic order in overturned sequences. Gain valuable insights into sedimentology principles and their applications in geological studies. Suitable for undergraduate and postgraduate geology students, this 28-minute video is part of a 16-week, 4-credit course taught by Dr. Harel Thomas, Professor of Applied Geology at Doctor Harisingh Gour Vishwavidyalaya.

Intro
Introduction Classification Inorganic sedimentary structures Primary (physical) structures Secondary (chemical) structures Organic (biogenic) structures Applications Summary
Sedimentary structures Introduction
Sedimentology is the science that deals with the description, classification, and origin of sedimentary rock and it is the study of sediments & sedimentation. The science of Sedimentology is a relatively new and young discipline (system) and the basic principles of Sedimentology have been developed and refined by geologists for over a century.
Primary Sedimentary Structures
Bedding geometry Arrangement of sedimentary rocks in beds or layers of various thickness and character A Bedding in external structures Lamination Beds The layer which separates the upper and lower part of sediment is known as beds. Beds less than 1cm is called as laminae, they are characturized by fine grained sediments.
They reflect upon the nature of the environment during sedimentation. The style and orientation of ripple marks may also be used as an indicator of which direction the water was flowing at the time of sedimentation. Biological structures are useful in places to determine stratigraphic order in a vertical overturned sequence. Trace fossils can be mapped and used to define major facies belts