Sorting(2) The greater the speed and energy involved, the larger or heavier are the particles that can be transported Unusually dense minerals(e.g. gold, platinum, magnetite)are deposited first when stream velocity slows Lighter particles are carried onward
Sorting (2) ◼ The greater the speed and energy involved, the larger or heavier are the particles that can be transported. ◼ Unusually dense minerals (e.g. gold, platinum,magnetite) are deposited first when stream velocity slows. ◼ Lighter particles are carried onward
Placer nuggets
Placer Nuggets
Sorting 3) a Nonsorted sediment is a mixture of different sizes arranged chaotically. a Till is a nonsorted sediment of glacial origin Smooth and rounded particles are transported by water or air
Sorting (3) ◼ Nonsorted sediment is a mixture of different sizes arranged chaotically. ◼ Till is a nonsorted sediment of glacial origin. ◼ Smooth and rounded particles are transported by water or air
e 到 2 Till, nonsorted till deposited by a lobe of the cordileran Ice Sheet in western Washington
Till, nonsorted till deposited by a lobe of the Cordileran Ice Sheet in western Washington
Varves a rhythmic layering occurs in varves varve is a pair of sedimentary layers deposited over the cycle of a single year. In spring, the inflow of sediment laden water increases and coarse sediment is then deposited throughout the summer. a During winter, very fine sediment slowly settles to form a thinner, darker layer
Varves ◼ Rhythmic layering occurs in varves. ◼ A varve is a pair of sedimentary layers deposited over the cycle of a single year. ◼ In spring, the inflow of sediment laden water increases and coarse sediment is then deposited throughout the summer. ◼ During winter, very fine sediment slowly settles to form a thinner, darker layer