00:00Sedimentary rocks are the rocks that are formed by depositing sediment in a place and solidifying it.
00:13There is a process in this.
00:15In this, I will discuss the weathering agent and the original agent.
00:20When you have forces on the mountainous area that are trying to balance the earth,
00:26you can also say that there are disintegration forces that are trying to balance the earth.
00:31Among them, there is water, obviously there is sun, there is air and glaciers.
00:36Let's take water as an example.
00:38When water flows from the mountainous area due to melting of glaciers or due to rainfall,
00:43the water tries to disintegrate and weather the mountains on its way.
00:50The weathering agent is weathered.
00:52The material that it picks up, with the help of force, it carries it along.
00:57During that journey, the pebbles break on their way and convert into small pieces.
01:05Let's take a sand or silt combo.
01:07When sand or silt goes into the plain areas, in the case of flood,
01:11when the same water is deposited in the surrounding area, it forms a layer.
01:18Let's say that the first year comes, a layer is formed of that deposit,
01:22which was carried from that journey.
01:25So the first layer came, then the next year, the flood came, another layer came,
01:28then the third year, fourth year, fifth year.
01:31In the same way, this process continued for millions of years.
01:35So what happened?
01:37This upper layer pressed the lower layer.
01:40So by pressing, you will get a block of the lower layer, which will form a solid block.
01:46So basically, in this process, we saw how sediment makes a layer.
01:51And with the compaction of the layer and the cementation of the minerals inside it,
01:55that thing joins together and takes the form of a rock.
01:58This is how a rock is formed.
02:00We call it sedimentary rock.
02:02There are different types of T2.
02:04We have mechanical form sedimentary rock.
02:14We have second category, chemically formed sedimentary rock.
02:22And the third category is organic sedimentary rock.
02:31So as you can see from the name, mechanically formed sedimentary rock,
02:35means such rocks which are mechanically formed,
02:38like I gave you an example,
02:40when pressure was applied, then cementation force was applied,
02:42so such rocks were formed, which are mechanically formed sedimentary rocks.
02:45There are further types of these, such as adhesive rocks,
02:48which have more particles of sand,
02:50and agilious rocks, which have more particles of silt.
02:53Second, we have chemically formed sedimentary rock, which is a chemical solution.
02:57For example, we have a chemical solution of sodium chloride.
03:02It is a chemical solution of mango salt.
03:04So what happened is, by evaporation process, the water evaporated from it,
03:09and we have the remaining samples of rock at the bottom.
03:13So all the rock salts that we get,
03:15are in the form of chemically formed sedimentary rock.
03:19Even though, we have processed it,
03:21we have also collected salt from the oceans.
03:24But in the same way, the example of limestone is that,
03:26in limestone areas, especially when water flows,
03:30it absorbs the limestone,
03:32makes a chemical solution inside it.
03:34Then, after all, during the journey, when the water evaporates,
03:38again it becomes a limestone rock.
03:41So this is an example of chemically formed sedimentary rock.
03:43Similarly, we have organic sedimentary rock.
03:47So in organic sedimentary rock, basically we have the fauna and flora,
03:50you can say that the remains of animals,
03:52or the remains of plants,
03:55they become a part of the sedimentary rock.
03:57In that case, there are two types of rocks,
04:00calcareous sedimentary rock, and carbonaceous sedimentary rock.
04:03So in calcareous rock, basically,
04:05calcium is more,
04:08you can say that the marine animals,
04:10or animal skeletons,
04:12the part of their rocks,
04:14that is, the rocks are formed,
04:16they are called organic sedimentary rock,
04:18or calcareous rock.
04:20And the rocks, the plants,
04:22like coal, for example,
04:24under the surface of the earth,
04:26in the absence of oxygen,
04:28the plants are formed into coal,
04:30into rock coal.
04:32So that is the carbonaceous rock.
04:34So we have calcareous rock,
04:36organic calcareous rock,
04:38and carbonaceous rock.
04:40So students, I am going over the basic definitions,
04:42I am telling you the basics of sedimentary rock,
04:44I will tell you the basics.
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