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Comment: 12:27 - 13:28 (01:01)
Source: Annenberg/CPB Resources - Earth Revealed - 17. Sedimentary Rocks: The Key to Past Environments
Keywords: "Walter E. Reed", "sedimentary rock", "clastic sediment", "sedimentary structure", bedding, bed, "bedding plane", interruption, time
Our transcription: One of the most obvious of these structures is "bedding," the layer cake pattern of rock strata.
The contact between two layers of rock is called a "bedding plane."
One of the very distinctive and probably the most compelling sedimentary structure that one sees when one looks at a stack of sediments is "beds."
Bedding surfaces represent interruption.
They may be long interruptions or short interruptions.
They may be just pulses of sediment where an interruption lasts just a momentary interruption.
They may be interruptions of thousands or even millions of years.
What is very obvious, from everything we know now is that, the sedimentary column that we have, the bedding surfaces themselves almost certainly represent far more time than the stack of sediments than we have preserved.
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