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An erratic block.
A boulder left behind by a retreating glacier is known as an erratic. A glacier is a moving river of ice and snow.
Glacial Erratic.
the glacier dropped small rocks as it melted. An erratic is a large boulder left behind after a glacier has melted
the glacier dropped small rocks as it melted. An erratic is a large boulder left behind after a glacier has melted
The boulder differs in composition from the underlying bedrock.
Erratic boulders can provide evidence of a flood because of the distance that is measured from where they were originally placed. This could only be through a strong current of water as they are usually displaced and out of place.
An erratic block.
An erratic block.
An erratic boulder is a boulder of rock which is of a different type than the local rocks. Erratic boulders are ofter more correctly termed glacial erractics as they were generally picked up, transported (often many hundreds of miles) and then finally deposited by melting glaciers.
it is called an Erratic
An isolated large boulder (known as an 'erratic boulder') standing in the open, was left there by a glacier, after the ice retreated at the end of an ice age.. They are known as an 'erratic'.
A boulder left behind by a retreating glacier is known as an erratic. A glacier is a moving river of ice and snow.
Glacial Erratic.
Erratic
Erratic
Erratic