(ii) The area commander concerned for Ready Reservists assigned to troop program units under their control. (See AR 140-1, para 1-6.) (iii)... The organization is heavily reliant on mobilized Troop Program Units (TPU) Reserves and Special Skills Trainers (SST) to complete our mission.
Noun. 1. striation-any of a number of tiny parallel grooves such as: the scratches left by a glacier on rocks or the streaks or ridges in muscle tissue. stria. groove, channel-a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record).
Key Concepts 1  : Glaciers are made of ice and rocks that get trapped in the ice. 2  Glaciers flow downhill because of gravity. 3  The moving glacier acts a lot like a bulldozer, stripping away layers of rock and moving them off to the side. 4  Rocks embedded in the bottom of the glacier scrape along the newly exposed bedrock and leave behind line-shaped 5  ... Tlacial striations are parallel to the handle of the hammer. Look at how the lines all go the same direction. Click to Enlarge. About : The scratch marks on the schoolyard are formed by the process shown on top -- a broom dragged along over wet tar.