Was there a lot lime in that crawlspace?
No, this whole damned hill is sand. I live on a ridge, which at one time before Erie receded would have been a sandbar then a beach. Dig in my ground and find pieces of sandstone worn off by water. On my lowest spot I've dug and found old shells about the size of my fingernail.
Of course Lake Erie is only 2-1/2 miles away from me.