sedimentary rocks

Question 1

lithification

Answer 1

taking sendiment and forming it into rocks

Question 2

sent=diedntary rocks make up__ amt of earth’s surface

Answer 2

75% of earth’s surface

Question 3

2 steps of the lification process

coampaction
cemintation

Answer 3

compaction: adding more rocks and pushing the rocks down to get it closer together, less space between the rocks

cementstion:
water adds to compaction, percipitates it, and glues it together leaving minerals behind

Question 4

clastic/detrital rocks

Answer 4

made of preexisting rock that broke apart

Question 5

chemical rocks

Answer 5

minerals cercipitatie out of a solution (ex calcium and calcite)

Question 6

organic rocks
eg. coal

Answer 6

fro carbon rich organisms

Question 7

clastic rock made of what?

Answer 7

quartz and clay minerals

Question 8

if find other silicate minerals in sedimentary rock

Answer 8

sediment didnt travel far from source rock

it depisited very quickly

Question 9

what is a mature vs immature rock?

Answer 9

immatrue: still lhas those silicates

mature: weathere longer so loots of quartz and elss of other silicates liek feldspar

Question 10

smallest grain of sediment rocks?

what size

Answer 10

clay
<.004 mm

Question 11

2nd smallest grain of sedimenty rock?

Answer 11

silt
.004-.06 mm

Question 12

sand grain size?

Answer 12

fine sand? .06
medium sand? .25
coarse sand? .5-2mm

can sometimes id the mineral with larger grain of sand

Question 13

biggest size of grains?

Answer 13

pebbles

Question 14

what is the most common sedimentry rock?

Answer 14

shale

it is very brittle, forms thin layers

Question 15

difference between shale and mudstone/siltstone?

simialrites?

Answer 15

shale has thin layers but mudstone has thick layers

s: in low energy enviorments EG, deep ocean, lakes