[Rockhounds] Massive stone structures in Saudi Arabia may be some of oldest monuments in the world

[Paul]

Massive stone structures in Saudi Arabia may be some
of oldest monuments in the world. They number in the
hundreds and can be larger than an NFL football field.
By Owen Jarus, Live Science, August 24, 2020
  https://www.livescience.com/mysterious-stone-structures-saudi-arabia-oldest.html

The paper is:

Groucutt, H.S., Breeze, P.S., Guagnin, M., Stewart, M.,
Drake, N., Shipton, C., Zahrani, B., Omarfi, A.A.,
Alsharekh, A.M. and Petraglia, M.D., 2020. Monumental
landscapes of the Holocene humid period in Northern
Arabia: The mustatil phenomenon. The Holocene,
p.0959683620950449.

Abstract:
https://journals.sagepub.com/doi/full/10.1177/0959683620950449

PDF file:
https://journals.sagepub.com/doi/pdf/10.1177/0959683620950449

Yours

Paul H.