Landform And Parent Material

Question 0

Depression

Answer 0

No visible surface drainage; usually thick surface and redox features

Question 1

Upland

Answer 1

Forming in residual or coluvial parent materials; no other distinction

Question 2

Floodplain

Answer 2

Lowest level associated with current stream. Little pedogenic development. Usually floods. Includes modern alluvial fans

Question 3

Stream terrace

Answer 3

Low relief associated with valley floors.

Question 4

Outwash plain

Answer 4

Low relief associated with valley floor. Stratified sand and gravel deposits sorted and deposited beyond glacial ice point.

Question 5

Recent alluvium

Answer 5

material transported by water and deposited on floodplains along present day streams or on active alluvial fans.

Question 6

Old alluvium

Answer 6

material transported and deposited by water as found on terrace positions. not commonly flooded under today’s conditions.

Stratification of material may or may not be evident but some well-rounded rock fragments are usually found within the soil profile.

Question 7

Colluvium

Answer 7

Unconsolidated material transported of moved by gravity and by local, unconcentrated runoff, often located at the footslopes of hills. material usually has little or no sorting. this category includes “local colluvium” from “slope wash”.

Question 8

Residuum

Answer 8

unconsolidated and partially weathered mineral materials accumulated by the disintegration of rocks in place.

Question 9

Loess

Answer 9

Wind-deposited material primarily silt- and very fine sand-sized. Most loess deposited in this region originated from the Delaware River.

Question 10

Outwash

Answer 10

Stratified sands and gravel produced by glaciers and carried, sorted and deposited by glacial meltwater. Outwash should be marked when an outwash plain landform is identified. Stratified, well sorted sands deposited by the Delaware River which drained glaciers to the north is where the predominant outwash is found in Bucks County.