Isotopes
What happens to the temp of water when there is a decrease in 18O?
The Temp rises/gets warmer.
If an igneous rock had a really dark color/black how would you describe the silica content?
Mafic or Ultramafic
What are the three types of plate boundaries?
Convergent, Divergent, and Transform
What are the three most recent Eras?
Cenozoic, Mesozoic, and Paleozoic
What type of rock in rock records most commonly shows a volcanic eruption?
Basalt
What happens to the temp of air when there is an increase of isotope D?
What are the two main groups of sedimentary rocks?
Siliciclastics and carbonates
Which Boundary type has the most Volcanic activity?
Convergent
What are the three most recent eons?
Phanerozoic, Proterozoic, and Archean
a type of planar rock feature that develops as a result of deformation and metamorphism.
Cleavage
What has to happen or is happening when there is an increase of 13C?
There is a burial of organic matter.
What is the beginning rock in a metamorphic process called?
Parent rock
What type of plate boundary caused the San Andreas Fault?
Transform
What eon, era, and time period are we in?
Phanerozoic eon, Cenozoic Era, and Quaternary period
the branch of science concerned with earthquakes
seismology
What can cause a decrease of 13C?
What are three main descriptors of carbonate sedimentary rocks?
Matrix to grain ratio, consolidation, composition, or components
What type of plate boundary is the Mid-Atlantic Ridge on?
Divergent
What can be found in the geological timescale in the same area?
Multiple answers: examples same rock types, same fossils, same layering.
If a sedimentary rock is mud supported, how big are the grains?
fine, clay or silt
What is the relative partitioning of the heavier and lighter isotopes between two coexisting phases in a natural system?
Isotope Fractionation
List 3 examples of textures of igneous rocks.
Groundmass, phaneritic, aphanitic, phorphyritic, phenocryst, xenocyrst, and/or pyroclastic.
How many tectonic plates are on earth?
15-20
What does “relative geologic time” refer to?
The timeline we have based on rocks and landforms. It is determined by fossils, rock layers, and rock types.
what are mudcracks and what type of rock are they commonly found on?
Mudcracks are sedimentary structures formed as muddy sediment dries and contracts. Crack formation also occurs in clay-bearing soils as a result of a reduction in water content. sedimentary rocks