31.   Sediment flowing into the craters could settle on the lake bottoms and eventually harden into layers of rock.

32.   Sediment flowing into the lakes could settle on the lake bottoms and eventually harden into layers of rock.

33.   Sediments can settle to the lake bottom and, over geologic time, form sheets of rock, one on top the other like pancakes in a stack.

34.   Ships were filled to capacity without worry about scraping lake bottoms.

35.   The magnetic crystals act as a sort of compass to allow the bacteria to orient themselves as they move along the lake bottom.

36.   The Maritime Museum found the vessel while conducting a several-year project to map the lake bottom and catalog shipwrecks and artifacts.

37.   The magnetic crystals act as a sort of compass to allow the bacteria to orient itself as it moves along the lake bottom.

38.   When the documentation is complete, the canoes will be reburied in the lake bottom.

39.   Searchers on horseback combed the nearby woods and divers twice scoured the lake bottom without success.