GEOLOGY
SEDIMENTOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Deep marine basins
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Deltas
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Most of the British Isles were still emergent following the Caledonian orogeny
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Estuaries
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Detailed explanation-1: -The North American coals of the Carboniferous period were formed in the tropical climate of the northern landmass (Laurasia) which was relatively hot and humid.
Detailed explanation-2: -Most published depositional models for coal-bearing strata suggest that coal originated as peat which formed in swamps on low-lying ground in deltas, alluvial plains and coastal areas.
Detailed explanation-3: -The North American Pennsylvanian environment was alternately terrestrial and marine, with the transgression and regression of the seas caused by glaciation. These environmental conditions, with the vast amount of plant material provided by the extensive coal forests, allowed for the formation of coal.
Detailed explanation-4: -Striated cobbles, glacio-fluvial deposits, and varved (deposited in still water) lacustrine (lake) sediments occur over large areas of present-day South America, Africa, India, Australia, and Antarctica.