Page 146 - Laboratory Manual in Physical Geology

A CTIVIT Y 4.5 Rocks and the Rock Cycle Model

Name: ______________________________________ Course/Section: ______________________ Date: ___________

A. On the rock cycle below, color arrows orange if they indicate a process leading to formation of igneous rocks, brown if they indicate
a process leading to formation of sedimentary rocks, and green if they indicate a process leading to formation of metamorphic rocks.
Place check marks in the table to indicate what rock group(s) is/are characterized by each of the processes and rock properties.

Compaction, cementation Sedimentary
(Lithification)

Sediment Heat, intense rocks

erosion, (Metamorphism) pressure

Uplift, weathering

Metamorphic
rocks

Igneous rocks
Melting

Magma
Cooling,
crystallization

Processes and Rock Properties Igneous Sedimentary Metamorphic
lithification of sediment
intense heating (but no melting)
crystals precipitate from water
solidification of magma/lava
melting of rock
compaction of sediment
cementation of grains
folding of rock
crystalline
foliated
common fossils

B. FIGURE 4.5 contains photographs of five rocks (a–e). For each photograph, record the following information in the chart

on the next page:
1. In column one (left-hand column), note the figure number of the rock sample photograph to be analyzed.

2. In column two (blue), list the rock properties that you can observe in the sample.

3. In column three (pink), classify the rock as igneous, sedimentary, or metamorphic.

4. In column four (yellow), describe, as well as you can, how the rock may have formed.
5. On the rock cycle diagram above, write the figure number of the photograph/rock sample to show where it fits in the

rock cycle model.
6. In column five (green), predict from the rock cycle ( FIGURE 4.2 ) three different changes that the rock could undergo

next if left in a natural setting.
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