This find was not earth shattering, or very conclusive of anything (except the elements were unusual), but it does require further investigation. Usually there is a reason for the soil to look as it does. So, the team needs to ask soil specialists what could have caused the striations in the soil, or were they manmade (and how?)
Unless the ranch decided to no longer attack people with radiation burns like Travis and Tom Winterton after digging, that problem seems to have gone away. So, dig away! They are simply going to have to dig into the mesa to get more answers.
They could possibly date the soil striations in the field to find out old it is and do the same with the layers above and below it. A competent Geology Department should be able to do that.
This one was for dedicated watchers. There was nothing too new in this. No real answers were given.