Sediments and Sedimentary Rocks g Sedimentary Rocks Part 1: Creatin 1) From the

Question

Sediments and Sedimentary Rocks g Sedimentary Rocks Part 1: Creatin 1) From the choices, list the steps necessary for a parent rock to become a detrital or chemical sedimentary rock. Each step will be used once. e,g. shalelmudstone) transportation (water, wid, ce) transportation (dissolved in water) deposition of detrital sediments compaction and cementation into roclk precipitation as rock precipitation as shells shells are deposited, compacted and cemented rtnt rock (changed composition-chemical weathering) rent rock is broken into smaller pieces Rock Limestone Rock Shale Part 2: Changing from Sediments to Sedimentary Rocks 2) Sandstone is a detrital sedimentary rock made up of sand-sized pieces. Examine the four steps and draw arrows to where they are occurring in the diagram. parent rock is broken into sand-sized pieces (sediments) sand-sized sediments are transported . sand-sized sediments are deposited deposited sand is compacted and cemented into sandstone (no longer sediments) O KORTZ AND JAGER DRAFT EDITION, 2006 LECTURE-TUTORIALS FOR INTRODUCTORY GEOSCIENCE

Explanation / Answer

1).

DETRITAL

1-Parent rock is broken into smaller pieces

2-Transportation( wind, water, ice)

3-Deposition of the detrital sediments

4-Compaction and cementation of rocks

CHEMICAL

1-Parent rock is dissolved

2- Transportation (dissolved in water)

3- Precipitation as rocks , 3- Precipitation as shells - 3.1 - shells are deposited compacted and cemented

2).

In the diagram flow from the top hilli region to the bottommost plain is-

1- Parent rock is brocken ito sand sized pieces( at topmost)

2- sand sized sediments are transported

3- sand sizwd sediments are deposited

4- deposited sand is compacted and cemented into limestone ( bottommost last plain)

3).

LEFT PHOTO -PEBBLE SIZED SEDIMENTS

RIGHT PHOTO - SINGLE SEDIMENTARY ROCK

4).

When these pebble sized sedements are accumulated at some place and if the deposition remains to happen for large span of time then the preceding sedimentary bed is subjected to the pressure by the succeeding beds or the latest or the nearby surface beds, thus he lowest bed subjects to the high pressure of overlying beds and high temperature due to geothermal gradient thus it needs into compaction and cementation into solid rock known as sandstone

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