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Sedimentary rocks are formed by layers of sediments that build up over along period of time. The rocks are being mixed and compressed together for extended periods of time.
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∙ 9y ago
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What are the layers formed as sediment builds up over a very long time called?
Strata
What are two ways that a rock layer can cause a gap in geologic record?
When rock layers are eroded or when a sediment is not deposited for a long period of time.
Why can you see different layers in sedimentary rocks?
Sedimentary rock is formed by silt and mud accumulating and being compressed into stone mostly by time and it's own weight. A few years of heavy rains would likely leave dirtier and darker deposits. Any violent change in the area ( earthquakes, volcanoes, etc. ) might completely change the nature and colour of the deposits on a short term or permanent basis. Biologics ( anything from bacteria to dinosaurs ) might have a period of unrestrained growth, affecting the type and shades of the layers.
Why are earth rock layers different?
Rock layers are different and unique to each other due to the fact that each layer represents a time period. They are formed when rock, sediment, and minerals settle into one place for a long time and harden when another layer goes over it. Reading rock layers allow geologists to determine how much time has passed. They even sometimes tell of the history of the earth and all of the disasters that have occurred in each era.
What are some questions a scientists would form about a sedimentary rock?
how old they are how long the layers formed what kind of rocks
What are the layers formed as sediment builds up over a very long time called?
Strata
Over a long period of time the layers of sediment turn into?
It is sand. Edit: Over many thousands of years - sediment gets compressed and compacted into layers. The layers form rocks such as slate and coal.
What happens when sediment builds up after a long time?
When sediment is built, chinese men start to shave thier asses with sumaria sords while epicman808 sings a song about vipond
What processes turn sediment into sedimentary rock?
The processes of compaction and cementation of this sediment over a long period of time turn the sediment into rock.
Are river deltas caused by erosion?
No, deltas are formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river. Over long periods of time, this deposition builds the characteristic geographic pattern of a river delta.
How are rocks made?
When pressure pushes down on sediment, the sediment turn solid because they have sat aside for a long time and the pressure builds up to form a rock.
Rocks formed from sediments deposits?
Sedimentary rocks are formed from sediment deposits (gravel, sand, silt, clay) over long periods of time either on land or in water (lakes, oceans). As more and more sedimentary layers are deposited, the newer layers exert pressure on the older layers, which compacts the loose particles and cements them together - forming sedimentary rocks. Sedimentary rocks can also be formed through the precipitation of dissolved minerals to form limestone or dolomite.
Crude oil is a fossil fuel what is a fossil fuel and how was the fossil fuel crude oil formed?
A fossil fuel is the remnant of organic materials that died millons of years ago. When an organism died that long ago, say a plant, it became buried under layers and layers of sediment(aka mud, sand, etc.). Over time, the pressure from these layers of sediment compressed the plant to the point that it underwent chemical changes, and became crude oil(Coal is also formed this way, so is natural gas, propane, and other fuels). Our world is powered by dead organisms from millons of years ago.
What rock formed out of sediment that have been pressed or cemented over a long period of time?
sedimentary rock
Why do you think paleontologists find fossils of small water plants but few other plants in deepest of rock layers?
No land plants in the deepest rock layers. Water plants are easily covered with sediment while land plants rot long before sediment covers them usually.
Why do you think paleontologists find fossils of small water plants but few other plants in the deepest rock layers?
No land plants in the deepest rock layers. Water plants are easily covered with sediment while land plants rot long before sediment covers them usually.
What are two ways that a rock layer can cause a gap in geologic record?
When rock layers are eroded or when a sediment is not deposited for a long period of time.
