Those formations are the outcome of first, a displaced cube that mhaze shared with me; then secondly, became the outcome of files shared by mogn/Hetzen/j meyer and combined with Mick's cube. You are familiar with the 'Rectangular Noise' thread - you will see those files there.
The vegetation models are from Walli except for the Atlas Blue Cedar which is an XFrog freebee (maybe he made it while working there).