Посмотрел ссылку, спасибо. boulder laden -- это уже даалеко не "с включениями", это чуть ли не просто валунник.
Значение слова Lade у Вебстера:
a : to put a load or burden on or in : load
b : to put or place as a load especially for shipment : ship
c : to load heavily or oppressively
And here comes an exhaustive description of HOW heavily or oppressively these boulder-laden grounds are boulder-laden:
"Some rock types constituting boulder laden ground include:
* Sedimentary rocks--cemented alluvial channel deposits, colluvium/talus, landslide debris, and glacial till
* Igneous rocks--agglomerates, lahars, and pyroclastic deposits
* Metamorphic rocks--tectonic melange and cataclastic fault zones
* Decomposed rocks--corestone bearing saprolites
Disc cutters are commonly utilised to cut hard blocks; however, compared to the understanding of cutter behaviour in hard continuous rocks, little is known regarding mechanisms in highly heterogeneous bouldery ground."
http://business.highbeam.com/4544/article-1G1-191071405/disc...
----- see, how *oppressively* they behave, these grounds!
The translation workplace 
