S11_GEOL_1001_Lecture_11

S11_GEOL_1001_Lecture_11 - Weathering and Sedimentary Rocks...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Weathering and Sedimentary Rocks The Twelve Apostles of Victoria, Australia are erosional remnants called stacks .
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Earth’s external processes Weathering – the physical breakdown and chemical alteration of rock at or near Earth’s surface Physical - Mechanical breakage and disintegration. Chemical - Decomposition by reaction with water. Erosion the physical removal of material by mobile agents such as water, wind, ice, or gravity
Background image of page 2
Sediments Sediment: Rock and mineral fragments. Shells. Mineral precipitates. Cemented into rocks.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Physical Weathering Mechanical breakup; doesn’t change mineral makeup. Detrital fragments classified by size. Coarse-grained – Boulders, cobbles, and pebbles. Medium-grained – Sand-sized. Fine-grained – Silt and clay (mud).
Background image of page 4
Deep crustal rocks are hot and under high pressure. Erosion removes material; deep rocks become exposed. At the surface, crustal rocks cool and expand. This causes through-going fractures called joints
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 15

S11_GEOL_1001_Lecture_11 - Weathering and Sedimentary Rocks...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online