Rocks and Landforms: ERRATA

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Notes on the 2001 Edition

Investigation 1: Different Types of Rock


Investigation 2: Rocks and Landforms in Your Region

Rare rock types have been removed. The table below includes rock types that may be most common to students.

NOTE: Rock types in italics are new or moved. The following rock types have been removed from the original table: graywacke, greensand, metabasalt, metabentonite, metadiabase, metarhyolite, norite, troctolite, and harzburgite. Hornfels and peridotite have been added to the table.

Major Rock Types
Sediments and Sedimentary Rocks Metamorphic Rocks Igneous Rocks
Intrusive Igneous (Magma) Extrusive Igneous (Lava/ash)
chert anthracite coal anorthosite andesite
clay/claystone gneiss diabase basalt
coal marble diorite pumice
diatomaceous earth greenstone gabbro obsidian
dolomite phyllite granite rhyolite
gravel/conglomerate quartzite migmatite scoria
limestone (crushed) serpentinite pegmatite tuff (ash)
mudstone schist dunite  
sand/sandstone slate peridotite  
shale hornfels    

Investigation 3: Rocks and Weathering

Page R26, Biological Processes in Weathering

Carbonic acid has not yet been introduced; therefore, the following describes the process as mentioned in the book.

Last line: "The carbon dioxide makes more carbonic acid, which promotes further weathering of the mineral material of the soil."

This weathering process of soil occurs when the carbon dioxide in the air dissolves in rainwater to form a weak acid called carbonic acid. Although this acid is harmless to plants and animals, it is able to dissolve some kinds of minerals within rocks that contain calcium, magnesium, and potassium, like limestones and feldspars. This form of weathering is called carbonization.

Investigation 4: Rock Abrasion


Investigation 5: Erosional Landforms


Investigation 6: Deltas and Floodplains


Investigation 7: Glaciers, Erosion, and Deposition


Investigation 8: Rocks, Landforms and Human Activity


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