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.
An example of a glacier moving a boulder would be when a large rock is picked up by a glacier as it flows downhill, and is transported along with the ice to a new location. This process, known as glacial plucking, occurs when the ice melts and the boulder is deposited on the ground.
Boulder Glacier is shrinking at an increasing rate, such that it will not be classified as a glacier soon (if not already). See the link below for repeat photos.
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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 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 glacier dropped small rocks as it melted. An erratic is a large boulder left behind after a glacier has melted
its called a forager
A large boulder left behind by a glacier is called a glacial erratic. These erratics are often significantly different from the surrounding rocks, providing clues about the glacier's movement and the rocks it passed over during its journey.
A boulder moved by a glacier is called a "glacial erratic." These large rocks are transported by the glacier as it advances and subsequently deposited in a different location when the glacier retreats. Glacial erratics can be composed of various types of rock and are often found in areas where the local geology is different from the rock type of the erratic itself.