When a stream or river slows down, it starts dropping its sediments. Larger sediments are dropped in steep areas. Some smaller sediments can still be carried by a slow moving stream or river. Smaller sediments are dropped as the slope becomes less steep. Alluvial Fans In arid regions, a mountain stream may flow onto flatter land. The stream comes to a stop rapidly. The deposits form an alluvial fan. Deposition also occurs when a stream or river empties into a large body of still water. In this case, a delta forms. A delta is shaped like a triangle. It spreads out into the body of water.

What type of feature is formed when mountain streams in arid regions flow onto flatter land and the stream comes to a rapid stop?

A flood occurs when a river overflows its banks. This might happen because of heavy rains. Floodplains In very flat regions, flood water may spread out on the surface of the land. It then slows down and drops its sediment. If a river floods often, a floodplain develops. A floodplain is an area where a thick layer of rich soil is left behind as the floodwater recedes. Thats why floodplains are usually good places for growing plants. They are very flat areas and they have very rich soils. The Nile River valley is a great example of a floodplain. Each year, the Nile River rises over its banks. This floodwater carries a lot of sediment. This sediment has been eroded off areas of land from upstream. This sediment is dropped as the water slows down after spreading across the land. What is left behind is a very rich soil. Thats why crops can be raised in the middle of a sandy desert. Natural Levees A flooding river often forms natural levees along its banks. A levee is a raised strip of sediments deposited close to the waters edge.

What forms the raised strip near the edge of a flooding river?

An archaeological party explore some caverns underground . Dr. Campbell and Dr. Hughes are the two leaders of the archaeological expedition , and get separated . While Dr. Hughes finds an alien corpse with a fossilized diamond , Dr. Campbell finds hieroglyphics at the cost of the party except for Hughes and himself . Two years later , Campbell and his assistant Holly are digging up the bones of Yonggary , a gargantuan dinosaur 50 times the size of a tyrannosaurus rex . Out of nowhere , people slowly are being killed around the site . While Holly is working Dr. Hughes , who has been legally dead for 2 years , goes to Holly and tells her to stop the dig . Dr. Campbell comes into the tent and sends Dr. Hughes off . Holly quits the expedition when another '' Accident '' occurs . In the town bar , Dr. Hughes finds Holly and takes her back to her Hotel room to tell her why he thinks the bones of the Dinosaur , Which he calls Yonggary , are going to bring the end of the world . After explaining , Holly and Hughes go to the site to stop Campbell but it is too late and Aliens resurrect Yonggary . After Yonggary's first appearance , the Army comes in and takes Holly and Campbell to an army base when Yonggary is dispatched by the aliens again . The army sends choppers after Yonggary , but he destroys them . Yonggary is then sent to the city and does some damage , where some jets attack him . Then Yonggary is transported to a power plant where he is attacked by rocket pack soldiers . During the fight , Hughes and Holly find out that the diamond on Yonggary's forehead is the device giving the aliens control of Yonggary .
What was Yonggary attacked by after the jets?