GEO 110 Lecture Notes - Lecture 6: Mudflow, Illuvium, Lithosphere
31 Oct 2016
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Chemical and mechanical weathering sometimes act together. Denudation: any process that wears away or rearranges landforms. No chemical change in the composition of rocks. Johnson"s shut-ins state park in the st. francois mountains, Salt crystal growth (salt weathering: turns into salt, which expands when it rains, salt melts and breaks down into smaller pieces. Dissolved minerals in running water cause rocks to break down. Rainfall erodes the limestone into pits and channels by dissolving it. Stalactite: hang from the top of the cave. Stalagmite: from the floor of the cave. Hydrolysis: chemical decomposition of rock by water, chemical reaction of water with a mineral, breaks down the silicate minerals. Oxidation: when certain metallic elements combine with oxygen to form oxides, ex. rusting of iron. Krs plateau in slovenia, where karst processes were first studied. Easily soluble in rain or acidic water. Funnel shaped depression have channels that form with ground water. Once you drain the water, the gravity causes collapsing.
