It is possible for cave formations like stalactites and stalagmites to wash out of caves, but I would expect them in lower areas like a creek bed or near sinkholes. Myself and some other geologists I reached out to have a few guesses as to what it appears to be based on the shapes:

• 1) It could be minerals that grew in a fissure like a mineral vein (some minerals like calcite grow into toothy pointed shapes like that)


• 2) a weathered stylolite which forms when minerals in rock dissolve under pressure and then reform (these can be found in limestones in Kentucky)


• 3) a cone-in-cone structure which may also form from minerals dissolving under pressure.

Any of these is a pretty neat find. You might try putting a little vinegar on it, and if it starts bubbling/fizzing then it is made of the mineral calcite.