SEDS: Conglomerate

Question 1

Consolidated grains of gravel-sized particles

Answer 1

Conglomerate

Question 2

Conglomerate with particles that were 64-256mm in diameter

Answer 2

Cobble Conglomerate

Question 3

Conglomerate wherein the clasts are angular

Answer 3

Breccia

Question 4

conglomerate where the clasts are both rounded and angular

Answer 4

Breccio-conglomerate

Question 5

Debris deposited directly by melting ice in a glacier

Answer 5

Till (tillite)

Question 6

a non-glacial till-like deposit (olistostrome or grainflows)

Answer 6

Tilloid

Question 7

composed of clasts of the same material as the matrix and is formed as a result of reworking of lithified sediment soon after
deposition

Answer 7

intraformational conglomerate

Question 8

A conglomerate in which clasts are exotic (i.e., derived from outside the depositional basin). Clasts are normally very well-rounded and well-sorted—clasts derived from a distant source.

Answer 8

Extraformational Conglomerate

Question 9

clast-supported conglomerate or
“true conglomerate

Answer 9

Orthoconglomerate

Question 10

A conglomerate in which all clasts are in contact with other clasts (i.e., the clasts support each other). Such conglomerates may have no matrix between clasts (open framework) or spaces between clasts may be filled by a matrix of finer sediment (closed
framework).

Answer 10

Orthoconglomerate

Question 11

Orthoconglomerate’s matrix is ___________

Answer 11

less than 15%.

Question 12

suggests an efficient sorting mechanism that caused the selective removal of finer-grained sediment

Answer 12

Open framework

Question 13

suggests that the transporting agent was less able to selectively remove the finer fractions or was varying in competence, depositing the framework-filling sediment well after the gravel-size sediment had been deposited.

Answer 13

Closed framework

Question 14

more than 90% of the framework clasts
consist of fragments of only a few varieties of resistant rocks and minerals as
metaquartzite, vein quartz, and cherts.

Answer 14

oligomict (orthoquartzose)

Question 15

clasts of many different compositions of metastable and unstable rocks are abundant; for example, basalt, slate, and limestone

Answer 15

petromict (polymict)

Question 16

imply wholesale decomposition and disintegration of immense volumes of rocks,
reflecting climate and topography that promotes chemical decomposition and physical disintegration of all but the most resistant components.

Answer 16

Oligomict orthoconglomerates

Question 17

much more abundant than oligomict orthoconglomerates and are mainly alluvium eroded from high-relief areas

Answer 17

Petromict

Question 18

A conglomerate in which most clasts are not in contact; i.e., the matrix supports the clasts

Answer 18

Paraconglomerate

Question 19

matrix-supported conglomerate

Answer 19

Paraconglomerate

Question 20

Matrix of sand or finer is at least 15% to 50%

Answer 20

Paraconglomerate

Question 21

Typical of the deposits of debris flows or water flows in which gravel size clasts were not abundant in comparison to the finer grain sizes

Answer 21

Paraconglomerate

Question 22

containing a matrix of delicately laminated mudrocks

Answer 22

Paraconglomerates

Question 23

coarser framework grains float in Paraconglomerate.

Answer 23

laminated pebbly (or cobbly, or bouldery) mudrock.

Question 24

the matrix is disorganized and non-laminated are either tillite (only if glacial origin can be inferred) or tilloid (deposited by mass movement)

Answer 24

Paraconglomerates

Question 25

A rudite composed of poorly sorted, mud to gravel-sized sediment, commonly with angular clast

Answer 25

Diamictite

Question 26

Commonly refers to sediment deposited from glaciers or sediment gravity flows, particularly debris flows.

Answer 26

Diamictite

Question 27

less susceptible to physical and chemical breakdown, and have a higher chance of being preserved as a clast in a conglomerate.

Answer 27

Resistant lithologies

Question 28

Factors controlling the resistance of a rock type

Answer 28

minerals present ;

ease with which they are chemically or physically broken down in the environment.