An exudate is a fluid emitted by an organism through pores or a wound, a process known as exuding. Exudate is derived from exude, to ooze, from the Latin exsÅ«dÄre, to (ooze) out like sweat (ex- out and sÅ«dÄre to sweat).
Glacial striations on bedrock. Rocks embedded in the bottom of a massive glacier scratched the rock underneath as the glacier moved along. Even though there is no ice present today, these scratched lines are evidence that glaciers were here in the geologic past.lacial 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.
Glaciers And Glaciation By definition a glacier is a mass of ice composed of compacted and recrystallized snow that flows under its own weight. This makes glaciers very effective agents of erosion, transportation and deposition of sediment. The two types of glaciers are Valley or Alpine glaciers Continental glaciers.The difference between them is where they flow. Valley glaciers flow in mountain valleys from high to low elevations. Continental glaciers or ice sheets flow over vast unconfined land areas.Valley glaciers are present at high altitude in mountain valleys of Alaska, the Italian Alps and New Zealand.lacial Drift. All sediment deposited by a glacier whether its a valley glacier or continental ice sheet, is called glacial drift. Till: unstratified sediment deposited directly by glacial ice. It is poorly sorted & contains large boulder, pebbles clay-sized particles.