What does graded bed mean?
Definitions for graded bed
grad·ed bed
This dictionary definitions page includes all the possible meanings, example usage and translations of the word graded bed.
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Wikipedia
graded bed
In geology, a graded bed is one characterized by a systematic change in grain or clast size from one side of the bed to the other. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into progressively finer ones. Such a bed is also described as fining upward. Normally graded beds generally represent depositional environments which decrease in transport energy (rate of flow) as time passes, but these beds can also form during rapid depositional events. They are perhaps best represented in turbidite strata, where they indicate a sudden strong current that deposits heavy, coarse sediments first, with finer ones following as the current weakens. They can also form in terrestrial stream deposits. In reverse grading or inverse grading the bed coarsens upwards. This type of grading is relatively uncommon but is characteristic of sediments deposited by grain flow and debris flow. A favored explanation for reverse grading in these processes is kinetic sieving. It is also observed in aeolian processes, such as in pyroclastic fall deposits. These deposition processes are examples of granular convection.
Numerology
Chaldean Numerology
The numerical value of graded bed in Chaldean Numerology is: 3
Pythagorean Numerology
The numerical value of graded bed in Pythagorean Numerology is: 5
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"graded bed." Definitions.net. STANDS4 LLC, 2024. Web. 1 May 2024. <https://www.definitions.net/definition/graded+bed>.
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