Thin section same as #198, but with different light; dark areas are pores.

Thin section (x200) showing calcareous nodule in a ferro-argillaceous matrix; black areas are voids

Thin section (x200) in Bt showing neo cutans

This section same as slide #201, but with xNicol; other was in ordinary light.

Crumb structure of Ah in profile of slide #140, at Dunlap Observatory at Richmond Hill woodlot.

Blocky structure in the Bt of the profile in slide #140; n.b. the ped, the pores and the argillaceous coating on the ped

Iron concretions (Bfcc) in a Douglas fir soil on Vancouver Island

Blocky, angular structure in the B of Slide #140 at Dunlap Observatory, Richmond Hill.

Winter and snow cover at the Dunlap Observatory, Richmond Hill, the location of profile in slide #140

Same location as slide #207, but in March as snow is melting n.b. the litter layer of the forest floor.