conglomerate
Sandstone is likely the sedimentary rock that was part of a beach, river, or stream environment. It forms from the accumulation and compaction of sand-sized particles, which are commonly carried and deposited by water in these environments.
A decrease in water velocity usually causes more sediments to be deposited at a location in a stream. This can happen when the stream widens, the channel gradient decreases, or obstacles such as rocks or vegetation slow down the flow of water.
Sediments like sand and gravel are typically deposited first in a stream channel due to their heavier weight and larger size compared to finer particles like silt and clay. These sediments settle out when the stream's velocity decreases, usually in areas with reduced flow or obstacles that disrupt the current.
Deposition of stream load occurs when the velocity of the stream decreases, causing the stream to lose the energy needed to carry sediment. As a result, sediment particles are deposited on the streambed or banks. This typically happens in areas where the stream's slope decreases or the stream widens.
Coarse sediment, such as gravel and larger particles, is typically deposited first in a stream channel due to its heavier weight and inability to remain suspended in the flowing water for extended periods of time. Finer sediment, like sand and silt, may be carried further downstream before being deposited.
conglomerate
conglomerate
Sandstone is likely the sedimentary rock that was part of a beach, river, or stream environment. It forms from the accumulation and compaction of sand-sized particles, which are commonly carried and deposited by water in these environments.
A stream's sediment load is typically deposited, eroded, and redeposited many times in a stream channel, especially during climatic variations such as flooding. Sediments are deposited throughout the length of the stream as bars or floodplain deposits. At the mouth of the stream, the sediments are usually deposited in alluvial fans or deltas, which represent a lower-energy, more "permanent" depositional environment that is less susceptible to changes in the stream flow. i got this from clift notes
Decrease in stream velocity
Decrease in stream velocity
The sedimentary rock from the stream mouth will contain more marine fossils (i.e. any at all) and will be composed of finer grains (as they are eroded during passage in the stream and as the stream gets closer to the sea or a lake it will tend to become wider and have a lower flow velocity meaning it has less energy to transport sediment meaning that the larger particles will have been deposited further up the stream nearer it's head). The rock from the stream head will have coarser grains and a lack of any marine fossils. Other indicators may be used depending on the specific rock type.
Sedimentation.
Levees and regoliths.
lake
A decrease in water velocity usually causes more sediments to be deposited at a location in a stream. This can happen when the stream widens, the channel gradient decreases, or obstacles such as rocks or vegetation slow down the flow of water.
a stream is most likely widen by erosion