Gosh! We have a rabbit that has been sitting in our freezer for quite a while because we
know what it's like to dig a deep hole in Wrightwood!

Maybe they just cremated the dead to save themselves the back ache. Maybe they took them to somewhere with softer, less rocky earth.
Maybe aliens flew them away.

Maybe they dug some holes, found a lot of actinlolite, sold it on Ebay and got rich, and forgot about the dead people.

Maybe they used the raised platform burial that many midwestern native americans used.
Maybe I should bury the rabbit.