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.
Tire mark striations are direct physical evidence of the direction of the force that was applied to the tire at the time the mark was deposited. Without braking, the tire force is perpendicular to the tire heading, and thus, the striations produced are perpendicular to the tire heading.ext, consider the effects of braking on tire mark/tire geometry. Figure 6 depicts three scenarios; a free rolling tire on the left, partial braking in the center and full wheel lockup on the right. The vertical line in each scenario, which is aligned to the tires velocity direction, has a dimensionless length of 1.