strange ice formation at edge of lake

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Chip Down
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strange ice formation at edge of lake

Post by Chip Down » November 3rd, 2019, 7:10 pm

It's like Moses came along and parted the ice.
Theories?
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Bosterson
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Re: strange ice formation at edge of lake

Post by Bosterson » November 3rd, 2019, 7:19 pm

Wow, that's bizarre.

Bigfeets?
Will hike off trail for fun.

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texasbb
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Re: strange ice formation at edge of lake

Post by texasbb » November 3rd, 2019, 7:23 pm

Post-freeze earthquake?

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teachpdx
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Re: strange ice formation at edge of lake

Post by teachpdx » November 4th, 2019, 7:36 am

I'm guessing that the water level in the pond dropped after the top froze, leaving this bit high and dry.

johnspeth
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Re: strange ice formation at edge of lake

Post by johnspeth » November 4th, 2019, 7:46 am

I hypothesize that wind blew this slab up onto the shore a bit.

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Chip Down
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Re: strange ice formation at edge of lake

Post by Chip Down » November 4th, 2019, 8:16 pm

Bigfeets?
That's about as plausible as my Moses theory.
Post-freeze earthquake?
I like this better than the Bigfeets theory.
I'm guessing that the water level in the pond dropped after the top froze, leaving this bit high and dry.
That sort of thing happens all the time in puddles and micro ponds, but doesn't look anything like this.
I hypothesize that wind blew this slab up onto the shore a bit.
Not as crazy as it sounds; I've seen similar penomenon. But I've always seen that result in a choppy broken surface.

My first thought was an ice dam formed, and then additional water entering the lake caused some water to spill over the edges of the ice and build up. But no, that doesn't make sense. The additional water would extend the perimeter of the pond, but wouldn't effect the edge configuration.

I observed a heavy accumulation of needle ice all around the pond. Could it have also formed under the pond ice, jacking up the pond ice, and filling in around the perimeter, giving the appearance of a thick abruptly-edged ice sheet?

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mjirving
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Re: strange ice formation at edge of lake

Post by mjirving » November 5th, 2019, 5:36 am

Is that the edge of the entire pond? I can’t tell for sure in the pic. Could it be spring fed with an exit that is blocked and it freezes on top before it gets to/falls off the side?

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Charley
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Re: strange ice formation at edge of lake

Post by Charley » November 5th, 2019, 11:58 am

Second vote for wind. I'm going to bet that several days of consistent direction wind pushed free lake water onto a thin slab of frozen lake water, one thin sheet of water at a time, building it up layer by layer. Word of caution: I'm a musician, not a scientist. :)

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