Geology Final Review Question Preview (ID: 53848)
Geology Semester Project!
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A bed is a...?
a) place to sleep!
b) single layer of sedimentary rock with a distinct top and bottom
c) multiple strata together
d) a sequence of strata that is distinctive enough to be a traced as a unit
Which of the following is NOT an example of bed-surface markings?
a) Mud Cracks
b) Scour Marks
c) Fossils
d) Turbidite
If you observed a layer of fine grained, coal deposits, what could you tell about the ecosystem when it was deposited?
a) Swampy; lower water level
b) Beach; high water level
c) Ocean; shallow water level
d) Ocean; deep water level
If you observed a layer of well-sorted, medium-grained sandstone, what could you tell about the ecosystem it was deposited in?
a) Delta Deposits
b) Coastal Beach
c) Deep Marine
d) Lake
What does uniformitarianism suggest?
a) Physical processes that happened in the past also happen today at the same rate
b) Beds must be composed of the same rock to be considered a strata
c) Sediments on the Earth settle out of fluids in a gravitational field
d) In sedimentary layers, each layer must be younger than the one below
If one rock (A) is cutting through another rock (B), which is the older rock?
a) Pick either A or B
b) B
c) A
d) Pick A or B
Which of the following is NOT a main type of uncomformity?
a) Linear
b) Discomformity
c) Angular
d) Nonconformity
What is closure temperautre?
a) The temperature the lab must be kept at in order to get an accurate reading
b) The temperature at which pyroclastic flows can form
c) The temperature at which ions cannot move in or out of a mineral quickly
d) The temperature at which electrons stop moving
What is it called when sea level lowers?
a) Regression
b) Diagenesis
c) Transgression
d) Subsidence
What is nonconformity?
a) Where mafic rock looks like felsic rock to the eye
b) Rocks deposited by glaciers
c) An unconformity parallel to the two sedimentary sequences it separates
d) Where sedimentary rocks overlie intrusive igneous rocks or metamorphic rocks
What is a stratigraphic formation?
a) The vertical sinking of the Earth’s surface in a region, relative to a reference plane
b) An interval of stata composed of a specific rock type or group that can be traced over a broad region
c) A setting in which sediments accumulate
d) A succession of several layers or beds together
What is absolute age?
a) Age (in years) of a rock
b) Age at which a rock underwent metamorphasis
c) Age at which minerals in the rock were deposited
d) Age at which bedding forms
How do we determine absolute age?
a) Examine banding
b) Identify nearby fossils
c) Radioactive Decay
d) Find the half-life
What can the geologic column tell us?
a) How old the Earth is
b) A correlation of stratigraphic formations around the world in order to create a record of Earth's geologic history
c) What a place's ecosystem looked like at a given time period
d) Where dinosaurs lived
What is lithification?
a) The processes which separate rock
b) The proportion of clasts in a rock which are the same size
c) The deposition of organic-rich sediments
d) The transformation loose clasts into solid rock
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