[ApplegateRanch]

The mastadon, IF that is what the lines are (I’ve seen some really weird “pictures” in supposedly random-pattern linoleum) doesn’t mean a lot, as the boulder could have come from elsewhere; it doesn’t look ‘native’ to that spot.

As to the rock formation, wasn’t the area of Traverse Bay either under ice or under even deeper water up until around 4,000 years ago?

[SunkenCiv]

Y'know, I'm not sure about the length of time... here in Grand Rapids, on the south side of Michigan Street, at the east end of the bridge, there's an historical marker which shows the various courses of the rivers flowing along the edge of the retreating ice sheet.

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The Cycle of Cosmic Catastrophes: Flood, Fire, and Famine in the History of Civilization by Richard Firestone, Allen West, and Simon Warwick-Smith

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