subangular blocky structure造句

Bt1 8 to; red ( 10R 4 / 8 ) clay; moderate medium subangular blocky structure; firm; sticky, plastic; common clay films on faces of peds; few fine flakes of mica; strongly acid; gradual wavy boundary.
BC 42 to; red ( 2.5YR 4 / 8 ) clay loam; few distinct yellowish red ( 5YR 5 / 8 ) mottles; weak medium subangular blocky structure; friable; few fine flakes of mica; very strongly acid; gradual wavy boundary . ( 0 to thick)
Bt2 26 to; red ( 10R 4 / 8 ) clay; few fine prominent yellowish red ( 5YR 5 / 8 ) mottles; moderate medium subangular blocky structure; firm; sticky, plastic; common clay films on faces of peds; few fine flakes of mica; very strongly acid; gradual wavy boundary . ( Combined thickness of the Bt horizon is 24 to 50 inches)
It's difficult to find subangular blocky structure in a sentence. 用subangular blocky structure造句挺难的