You had said earlier that the Mongolian sandstones contained boulders. Were
you referring to what the authors of the January Geology article said were
carbonate concretions? I didn't find any other reference to boulders or
cobbles in the article.
glenn
Adam, Apes, and Anthropology: Finding the Soul of Fossil Man
and
Foundation, Fall and Flood
http://www.isource.net/~grmorton/dmd.htm