I think low tide trapped some oddly shaped ice chunks against the shore. It's the only thing I can think that would cause these weird structures to form. The top part would be floating in the frigid, yet positive temperatures of the arctic ocean. It would reflect sunlight heat away from itself due to the white shine. But below the water, the "warm" liquid could eat away at the ice, leaving the skeletal remains of what was once a big slab of solid mass.
They remind me a bit of a mushroom or an umbrella. These were some of the last remaining ice chunks still floating in the south part of the bay. A windy day may blow more into the bay, but for now it's been ice free and boating activity is really picking up. Everyone is taking their boats down to the shore at or near low tide, pushing them off their trailers and then loading up while they wait for high tide so they can take off to go Walrus hunting or Char fishing.
All photos are my own, taken by myself. They are taken using a Nikon P900 and a Samsung S20. Consider checking out my website, Midnight Sunsets. I'm also on Twitter and Instagram!
