SBOG FG Exam Reg Review with
Complete Solutions
Anion - ANSWER-A negatively charged ion
Aphanitic - ANSWER-An igneous rock texture that refers to the grains not visible to the
naked eye, and therefore indicative of fast cooling.
Aureole - ANSWER-The zone of metamorphosed rock surrounding an igneous intrusion
and showing the effects of contact metamorphism
Bar - ANSWER-A unit of pressure equal to 10 to the 6th dynes/cm2, approximately one
atmosphere (atm)
Bowen's Reaction Series - ANSWER-The sequence of minerals that form in the process
of fractional crystallization of a magma
Burial Metamorphism - ANSWER-A type of low-grade regional metamorphism affecting
sediments and interlayered volcanic rocks that has lower temperatures (200 to 450 C),
without any influence of orogenesis or magmatic intrustion
Cation - ANSWER-A positively charged ion
Color Index - ANSWER-A number that represents the percent by weight or volume of
dark-colored minerals in a rock.
Contact Metamorphism - ANSWER-Metamorphism associated with the intrusion of an
igneous mass. Metamorphic changes are caused principally by heat, but also by
magma composition and deformation related to the intrusion. Pressures are relatively
low (<3000 bars) while temperatures range from 200 to 1000 C.
Diagenesis - ANSWER-The physical and chemical changes undergone by sediments
when compacted and lithified.
Eugeosyncline - ANSWER-The oceanic part of a geosyncline characterized by
volcanism associated with clastic sedimentation.
Extrusive Rocks - ANSWER-Igneous rocks that have been erupted on the surface of the
Earth.
Complete Solutions
Anion - ANSWER-A negatively charged ion
Aphanitic - ANSWER-An igneous rock texture that refers to the grains not visible to the
naked eye, and therefore indicative of fast cooling.
Aureole - ANSWER-The zone of metamorphosed rock surrounding an igneous intrusion
and showing the effects of contact metamorphism
Bar - ANSWER-A unit of pressure equal to 10 to the 6th dynes/cm2, approximately one
atmosphere (atm)
Bowen's Reaction Series - ANSWER-The sequence of minerals that form in the process
of fractional crystallization of a magma
Burial Metamorphism - ANSWER-A type of low-grade regional metamorphism affecting
sediments and interlayered volcanic rocks that has lower temperatures (200 to 450 C),
without any influence of orogenesis or magmatic intrustion
Cation - ANSWER-A positively charged ion
Color Index - ANSWER-A number that represents the percent by weight or volume of
dark-colored minerals in a rock.
Contact Metamorphism - ANSWER-Metamorphism associated with the intrusion of an
igneous mass. Metamorphic changes are caused principally by heat, but also by
magma composition and deformation related to the intrusion. Pressures are relatively
low (<3000 bars) while temperatures range from 200 to 1000 C.
Diagenesis - ANSWER-The physical and chemical changes undergone by sediments
when compacted and lithified.
Eugeosyncline - ANSWER-The oceanic part of a geosyncline characterized by
volcanism associated with clastic sedimentation.
Extrusive Rocks - ANSWER-Igneous rocks that have been erupted on the surface of the
Earth.
