Chapter 6. Igneous Rocks and Activity
define the term rock.
distinguish between magma and lava.
distinguish between intrusive and extrusive
rocks; between volcanic and plutonic rocks.
describe the various geologic structures formed by
volcanoes and the underground solidification of magma (plutons).
discuss the variety of ways in which many different
rocks might be derived from the same parent magma including fractional
crystallization, assimilation of country rock, and magma
distinguish between and give examples of rocks which
possess the following texture types: phaneritic,
aphanitic, glassy, porphyritic (including ground
mass and phenocrysts), pegmatitic, and pyroclastic.
be generally familiar with the peridotite, basalt-gabbro,
andesite-diorite, and granite-rhyolite
families of igneous rocks.
give a general explanation for Bowen's reaction
series, including both the continuous and discontinuous
intelligently use the terms mafic, felsic,
silicic, and intermediate rocks.
make a connection between the production of igneous
rocks and structures with plate tectonics theory.. Where and
how are these structures formed today?
describe the significance of pillow basalts.
Critical Thinking Questions and Activities:
On a lonely Friday night, watch a lava lamp do its
thing! Now try to figure out why this is an appropriate activity
for this chapter.
Field Trip Opportunities:
- Visit a cemetery or take a self-guided walking tour of downtown
Scranton to find examples of igneous, sedimentary, or metamorphic
rock types used as building or paving materials.