I was a child hiking through the dense pine forest off the coast of the Pacific Northwest: the island called vashon. I noticed this unique brain looking object half buried beneath sediment. There is a small raised four digit imprint smack dab in the middle. Any idea what species this might be?
Hmmm. Your geography is a little skewed, as well as the tree species found in the Puget Sound area. I also don't think coprolite or dino footprints would survive grinding along under a glacier, which is what Vashon Island is...glacial till.