Please complete the table based on the photograph in the link below. Sample Text

Question

Please complete the table based on the photograph in the link below.

Sample

Texture (grain size, shape, sorting)

Clastic Components

Chemical components

Biogenic components

Minerals/rock fragments present

Name of Sedimentary Rock

Rock History (transporting agent, environment, etc)

10

11

12

13

14

15

16

17

18

19

http://oi66.tinypic.com/or48yc.jpg

Sample

Texture (grain size, shape, sorting)

Clastic Components

Chemical components

Biogenic components

Minerals/rock fragments present

Name of Sedimentary Rock

Rock History (transporting agent, environment, etc)

10

11

12

13

14

15

16

17

18

19

Explanation / Answer

Fine grained

and laminated

clay minerals

black

shale

are forned in reducing environmrnt due to compaction of mud and silt.

Cryptocrystalline

quartz

fined grained,dark,smooth

nd has conchoidal fractures

Medium grained

wellsorted

evaporative

environment,

lagoonal or neritic

Siltstone or fine grained

sandstone

fined grained

powdery

calcium

carbonate

extremly coarse grained clast

to medium grained clast,angular to subrounded

poor sorting

Cement

Quartz ,

feldsper

rockfragments

No 12 may be dolomite it is not clear to me from the pictures as lot sedi rocks look the same.

S,NO Texture chem comp Clastic cmp bio comp Minerals Name History 10

Fine grained

and laminated

Al2O3 and Sio2 rich mud,silt organic content high

clay minerals

black

shale

are forned in reducing environmrnt due to compaction of mud and silt.

11

Cryptocrystalline

quartz

SiO2 quartzvgrains no Quartz chert by precipitation of silicious organism. 12 13 ill sorted,fined to coarse grained Sio2 dominated Quartz,feldsper none quartz,feldsper Breccia Found in brecciated zone such as shear zones,falt zones. 14

fined grained,dark,smooth

nd has conchoidal fractures

SiO2 none to silica none cryptocrystalline quartz flint precipitation od biochemical silica.occur as nodules and masses in limestone 15 fine coatedsperical grains called ooids CaCO3 Sand-sized spheres (Ooids) none calcite oolitic limestone formed in high energy marine environment 16

Medium grained

wellsorted

Nacl none none rock salt halite

evaporative

environment,

lagoonal or neritic

17 Fine grained,well sorted Sio2,Al2o3 silt and fine sand none quartz,feldspar

Siltstone or fine grained

sandstone

compaction and lithified sand and silt 18

fined grained

powdery

calcium

carbonate

calcite organic Ooze calcite Chalk compaction of marine calcite ooze. 19

extremly coarse grained clast

to medium grained clast,angular to subrounded

poor sorting

Cement

Quartz,feldsper none

Quartz ,

feldsper

rockfragments

Conglomerate may be of fluvial origin as the rock is framework supported

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