sedimentary rocks continued
water
ripple marks suggest that the area was once covered with ____
sand
second largest sediment size, particles can range in size (coarse vs fine)
silt
second smallest sediment size, the eye can just barely see the largest crystals
conglomerate, breccia
some examples of rocks composed of gravel size sediments include ____ & ____
quartz sandstone, arkose
some examples of rocks composed of sand sized sediments include ____ & ____
siltstone
one example of a rock with silt sized sediment is ____
true
(t/f) mud cracks suggest that the area used to be wet but dried out over time (such as a ancient flood plain)
true
(t/f) sedimentary rocks preserve clues about the environment in the past
ripple marks
Small waves of sediment formed by moving water or blowing wind
clay
Smallest sediment size
fissle
Splits easily into sheets (shale)
fossils
The preserved remains or traces of organisms in the rock layer that once lived on Earth
cementation
The process in which minerals precipitate into pore spaces between sediment grains and bind sediments together to form rock.
lithification
The process through which sediments turns into rocks after being buried
mudstone
____ could be considered to have silt or clay sized sediments
clasts
broken pieces of rock
paleocurrents
flow direction of ancient currents
gravel
largest sediment size
bedding
layering visible in rocks that results from the settling of particles during deposition
mud cracks
mud dries up and cracks into polygon-like shapes, the sediments then lithify, leaving behind rock with a unique pattern
claystone
one example of a rock with clay sized sediments is ____
wavy
symmetric ripple marks suggest that the water was ____
crossbedding
the pattern in rocks left by water and wind blown sediment
compaction
the process by which sediments are pressed together under their own weight, reducing the pore spaces between them