Detrital Sedimentary Rocks

Question 1

Sedimentary rocks made up of gravel-sized sediments. , Also called Rudites.

Answer 1

Gravelstones

Question 2

Gravelstones that are made up of rounded sediments.

Answer 2

Conglomerate

Question 3

Gravelstones that are made up of angular sediments.

Answer 3

Breccia

Question 4

Gravelstones with an interior source, eroding from the same source and lithifying in place, making the clasts and matrices’ compositions uniform.

Answer 4

Intraformational

Question 5

Gravelstones with composition derived outside of depositional basin, with the clasts and matrices’ composition different from each other.

Answer 5

Extraformational

Question 6

Clast- supported conglomerates.

Answer 6

Orthoconglomerates

Question 7

Matrix- supported conglomerates.

Answer 7

Paraconglomerate

Question 8

Describes gravelstones with more than 90% of the framework clasts consisting of a single or few resistant rocks and/or minerals.

Answer 8

Oligomict

Question 9

Describes with clasts of gravelstones different compositions that are prone to weathering and erosion.

Answer 9

Petromict

Question 10

Describes gravestones with clasts composed of a single composition

Answer 10

Monomictic

Question 11

Describes gravelstones with clasts composed of about 2-4 different types of parent rocks.

Answer 11

Diamictic

Question 12

Describes gravelstones with clasts with numerous amounts of types of composition

Answer 12

Polymictic

Question 13

A type of gravelstone composed of lithified colluvium deposited from mass wasting.

Answer 13

Diamictite

Question 14

Sedimentary rocks made up of sand-sized sediments. Also called Arenites

Answer 14

Sandstones

Question 15

A classification sandstones of that classify sandstones based on the proportions of quartz (Q), feldspars (F), and lithic fragments (L), normalized as:

Answer 15

Folk’s Schemes

Question 16

Sandstones with significant amount of feldspars.

Answer 16

Arkose

Question 17

Sandstones with significant amount of mud matrix.

Answer 17

Wacke

Question 18

An older, general term for matrix-rich sandstone.

Answer 18

Graywacke

Question 19

Sedimentary rocks made up of mud-sized sediments. Also called Lutites

Answer 19

Mudrock

Question 20

Mudrocks that are - made up of silt-sized sediments.

Answer 20

Siltstone

Question 21

Mudrocks that are made up of clay-sized sediments.

Answer 21

Claystone

Question 22

Mudrocks that are made up of the combination of silt- and clay-sized sediments.

Answer 22

Mudstone

Question 23

A type of mudrock the shows distinct layering.

Answer 23

Shale

Question 24

Banding observed among mudrocks where they tend to break.

Answer 24

Fissilty

Question 25

Smectite-rich claystones that formed from the alteration of volcanic ash deposits from explosive eruptions.

Answer 25

Bentonite