Particle Shape

sub-rounded

http://resource.geosciml.org/classifier/cgi/particleshape/sub_rounded

definition A clastic sedimentary particle showing considerable but incomplete abrasion and an original general form that is still discernible, and having many of its edges and corners noticeably rounded off to smooth curves, such as a cobble with a reduced number (5-10) of secondary corners, a considerably reduced area of the original faces, and a roundness value between 0.35 and 0.49 (midpoint at 0.41). more like this
source Powers, M. C., 1953 A new roundness scale for sedimentary particles. Journal of Sedimentary Petrology, v. 23, p. 117-119 more like this
type
Resource
Concept
in scheme particleshape
has top concept
sub rounded
is primary topic of sub rounded
top concept of particleshape