What are fragments of rocks minerals and remains of living things?

What are fragments of rocks minerals and remains of living things?

Sediment- Rock fragments, dissolved minerals and remains of living and nonliving parts of plants and animals.

What can we learn from erratics?

Some erratics are useful to scientists because they are of a distinctive rock type, which means that their source outcrop can be identified and located. Glacial erratics are therefore useful in reconstructing past glacier flow directions, the timing of glacier retreat, and even the type of glacier flow.

How is erratics formed?

Erratics are formed by glacial ice erosion resulting from the movement of ice. Glaciers erode by multiple processes: abrasion/scouring, plucking, ice thrusting and glacially-induced spalling.

What is the difference between till and drift?

Till is the material that is deposited directly by the glacier. Stratified drift is the sediment laid down by glacial melt water. The main difference between till and stratified drift is that ice cannot sort the sediment it carries, hence till is composed of unsorted particle sizes.

How are drumlins formed?

Drumlins are oval-shaped hills, largely composed of glacial drift, formed beneath a glacier or ice sheet and aligned in the direction of ice flow.

Where are the drumlins found?

Drumlins are commonly found in clusters numbering in the thousands. Often arranged in belts, they disrupt drainage so that small lakes and swamps may form between them. Large drumlin fields are located in central Wisconsin and in central New York; in northwestern Canada; in southwestern Nova Scotia; and in Ireland.

What are a group of drumlins called?

Drumlins are elongated hills of glacial deposits. They can be 1 km long and 500 m wide, often occurring in groups. A group of drumlins is called a drumlin swarm or a basket of eggs, eg Vale of Eden.

What is the meaning of drumlins?

: an elongate or oval hill of glacial drift.