Possible monster fungi fossil prototaxites

You can make out the canoe-shaped fossil with the dark core. Found in a stream bed in the greater Columbus (Ohio) area. This is the blue shale just beneath the Ohio Shale (Devonian, about 400 million years ago). This shale is full of other curious fossils and minerals (primarily pyrite and marcasite).

The fungi Prototaxites (see below) were the largest living land organism of their time, reaching a meter wide and 3 meters tall. https://en.wikipedia.org/wiki/Prototaxites

Prototaxite fossils have been found in the Cleveland Black Shale (which roughly corresponds to the exposed shales in central Ohio).
https://www.sciencedirect.com/science/article/abs/pii/003466679290030K

Artists renderings of these wonderful weirdo fungi.