1/14
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
In a region with an ephemeral stream, the water table drops below the stream channel for at least part of the year, resulting in a dry channel, but water flows for other parts of the year.
True
The "thalweg" is:
The deepest part of a river channel
Which of the following will NOT result in a change in base level?
Headward erosion
In the following, the microscope image of the right-most rock sample is most likely to have been found in which sort of environment?
Beach environment, transported far from source
The extinction of the dinosaurs (and many others) at the end of the Cretaceous Period is widely thought to be related to the impact of a large meteorite. Evidence for this includes:
Large impact structure of appropriate age found offshore of Yucatan
Particles of molten glass and "shocked" quartz
Concentration of iridium and other elements in sediments of that age, elements that are rare on Earth but common in meteorites
The Rocky Mountains in North America have a slightly unusual origin story. Which of the following is hypothesized about their cause?
Subduction of a more buoyant oceanic plateau, causing flattening of the subduction zone and compression inland
Put the following types of time divisions in order, from longest (1) to shortest (5).
Eon
Era
Period
Epoch
What is the age of the oldest mineral grain that has been found on Earth? Put your answer in billions of years, i.e., 2.3 billion would be 2.3.
4.4
Place the following events in order
Most recent
Illinoian Ice age
Evolution of flowering plants
Jurassic
Extinction of 2/3 of species on Earth, perhaps associated with Siberian Traps (extensive volcanic activity)
Carboniferous
Deposition of major salt layers found in upstate New York
Cambrian
Earliest life on Earth
Hadean
Oldest
At what point in Earth's history do we see the first evidence of life?
3.8 Billion Years
A stratigraphic formation is which of the following
An interval of strata that extends over a fairly large area, composed of a specific, fairly uniform rock type
Match the type of unconformity with the observation: angular unconformity
Strata above have a different dip than strata below
Match the type of unconformity with the observation: conformable
Match the type of unconformity with the observation: disconformity
A gap in the fossil succession or a surface of erosion/weathering
Match the type of unconformity with the observation: nonconformity
sedimentary rock on top of igneous/metamorphic rock