A Floating Rock!

Who says rocks can’t float? This rock certainly had the appearance that it was ‘floating’ on the surface of the water. In reality the rock had been embedded in a large chunk of ice that had recently calved off the Sawyer Glacier (below) in the Tracy Arm fjord in SE Alaska. Eventually the ice will melt from around it as it gets closer to the mouth of the channel and the rock will finally give in to gravity and will sink to the depths below. But it’s worth thinking about for a second that this is a 21st century example of how during the ice age rocks and very large boulders got transported and moved many, many miles from their original starting point and how rocks with no immediate geological similarity to those around them came to be there! (See also Blue Ice).

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