Chemical Sedimentary Rocks

Question 1

dominantly composed of calcareous components such as calcite, aragonite, dolomite, and siderite

Answer 1

carbonates

Question 2

formed through precipitating from solutions as ions from evaporations

Answer 2

evaporites

Question 3

dominantly composed of silica

Answer 3

siliceous

Question 4

organic dominated rocks

Answer 4

organic carbonaceous

Question 5

dominantly composed of iron

Answer 5

ironstones

Question 6

dominantly composed of phosphates

Answer 6

phosphates

Question 7

rocks dominantly composed of calcite

Answer 7

limestone

Question 8

rocks dominantly composed of dolomite

Answer 8

dolostone

Question 9

process where calcite carbonates are converted to dolomite

Answer 9

dolomitization

Question 10

sand to gravel sized carbonate particles

Answer 10

grains/allochems

Question 11

mud sized carbonate particles

Answer 11

micrite

Question 12

formation of micrite by micro-boring activity of blue-green cyanobacteria

Answer 12

micritization

Question 13

clastic carbonate dominantly composed of ooids

Answer 13

oolite

Question 14

clastic carbonates dominantly composed of pisoids

Answer 14

pisolite

Question 15

carbonate rocks with gravel-sized particles

Answer 15

calcirudite/dolorudite

Question 16

carbonate rocks with sand-sized particles

Answer 16

calcarenite/dolarenite

Question 17

carbonate rocks with mud-sized particles

Answer 17

calcilutite/dololutite

Question 18

coarse limestone made up of poorly cemented shells and shell fragments

Answer 18

coquina

Question 19

soft, porous variety of limestone

Answer 19

chalk

Question 20

limestone commonly deposited in caves

Answer 20

travertine

Question 21

stalactices, stalagmites, and columns

Answer 21

speleothems

Question 22

limestone commonly deposited in hot springs

Answer 22

tufa

Question 23

carbonate forming snails

Answer 23

molluscs

Question 24

carbonate forming shells

Answer 24

bivalves

Question 25

a class under the mollusca phyllum

Answer 25

gastropods

Question 26

carbonate forming sea urchins

Answer 26

echinoids

Question 27

carbonate forming sea lillies

Answer 27

crinoids

Question 28

single celled organisms composed of calcite

Answer 28

foraminifera

Question 29

carbonate forming corals

Answer 29

cnidaria

Question 30

important source of biogenic carbonates

Answer 30

algae

Question 31

red algae that encrust surfaces

Answer 31

rhodophyta

Question 32

green, rod shaped algae

Answer 32

chlorophyta

Question 33

yellow-green algae

Answer 33

nanoplankton

Question 34

prehistoric carbonate forming organisms

Answer 34

cyanobacteria

Question 35

phytoplankton with calcite

Answer 35

coccolithophore

Question 36

sequence of evaporite deposition

Answer 36

calcite; gypsum; anhydrite; halite; sylvite; carnallite

Question 37

diatoms

Answer 37

phytoplankton

Question 38

radiolaria

Answer 38

zooplankton

Question 39

non-clastic sedimentary rock made up of microcrystalline quartz

Answer 39

chert

Question 40

black chert

Answer 40

flint

Question 41

red chert

Answer 41

jasper

Question 42

green chert

Answer 42

prase

Question 43

concentric chert

Answer 43

chalcedony

Question 44

rocks with high concentration of phosphates

Answer 44

phosphorites

Question 45

calcium phosphate mineral

Answer 45

francolite

Question 46

fossilized feces that may be high in phosphates

Answer 46

coprolite

Question 47

precambrian, iron-rich rocks

Answer 47

banded iron formations

Question 48

rocks with high concentration of iron

Answer 48

ironstones

Question 49

Archean BIF formed 3.8 Ga - 2.6 Ga

Answer 49

algoma-type

Question 50

proterozoic BIF formed 2.6 Ga - 1.8 Ga and again from 0.8 Ga to 0.5 Ga

Answer 50

superior-type

Question 51

BIF deposited immediately during glaciation during the Snowball Earth period

Answer 51

rapitan-type

Question 52

organic-rich deposit that generally forms in swamps

Answer 52

peat

Question 53

remains of plant material that accumulates in anoxic underwater conditions

Answer 53

sapropel

Question 54

sedimentary rocks rich in solid organic matter

Answer 54

coal

Question 55

classification of coal based on how cooked they are

Answer 55

coal rank

Question 56

mudrocks rich in organic material that can be extracted in the form of oil or gas

Answer 56

oil shales