Відео

@@anupamasingh6541 बिलकुल समझा देंगे लेकिन वीडियो पे नहीं, आपको एक ऑडियो नोट्स बना कर भेज देंगे। आप अपना ईमेल भेज दीजिए

If you listen to the explanation of that questions carefully, you will get the answer. It’s not just the composition but the depth at which a certain organism lives. Except the Lepidocyclina, all others are planktons. It means all the other three live in open ocean while Lepidocyclina lives in shallower depths. So its tests will be deposited at shallower depth. That is why its ooze is shallowest. The other three which live in open ocean will be deposited as per the lysocline.

​@@MrVikramsingh1thankyou sir...

Sir I have a doubt related to fluvial and glacial environment facies in sedimentary

@onlyfact1115 go ahead and send it

How Anastomosing have several major channel and what process are responsible for making Anastomosing in fluvial

@onlyfact1115 Anastomosing river channels form through a combination of processes: Tectonic stability: Low tectonic activity allows rivers to maintain a stable course over time. High sediment load: Rivers carrying high amounts of sediment, especially fine-grained particles, deposit material along their banks, creating multiple channels. Aggradation: Sediment deposition raises the riverbed, causing the river to overflow and create new channels. Avulsion: Sudden changes in the river course, often due to flooding or sediment blockages, lead to the formation of new channels. Meandering: Rivers with high sinuosity can develop multiple channels as meanders are cut off or abandoned. Wetland or floodplain interaction: Rivers flowing through wetlands or floodplains can create multiple channels due to interactions with soft sediments and vegetation.

Thank you sir for giving your valuable time and I will note down in my notes, now

Thanks

Currently I am in Germany and will reply to you in detail once I get back. Send me your email.

Petroleum geology by RC Selley and Another book by Levorsen

Send me a mail

Yes, definitely

Island arc is formed due to convergent motion of continental plate and oceanic plate.

I haven’t uploaded these slides anywhere.

It’s a good question. Yes, actually the regular Echinoidea compressed their tests to attain the shifting of peristome and periproct at two opposite poles. The analogy can be taken as: if you take a clay ball and make two holes in a plane. To make the holes go away from each other, you will have to distort the spherical shape to a compressed one.

I don’t have the soft copy of it. I will search. If I get it will send it to you. Send me your email

Coleoidea has generally straight shells. The remaining two groups have planispiral coiling. Both of these groups can have evolute or involute coiling.

@@MrVikramsingh1 sir please answer this question in tectosilicate ratio of silicon to oxygen is 1:2 and in case of feldspar which also have tectosilicate structure their are 3 si and 8 oxygen sir don't you it's disturbing the tectosilicate general formula rule .how is it possible that in feldspar their is si3o8 . instead it should be si3o6 then it should justify the si:o ratio of 1:2

@@user-ne1hj6sd6s It is 1:2 in feldspars also. What you didn’t realise is that in feldspars, there is Al also along with Si. Orthoclase is KAlSi3O8, Albite is NaAlSi3O8. So you can see the ratio of (Al+Si):O= (1+3):8=1:2. In feldspars 1/4 of Si is replaced by Al

The Gastropoda shells are called conch (shankh). The coiling is not layering. It is the way a shell is twisted and rolled. If it makes a cone it is conispiral / trochospiral and if it is like a disc (jalebi), it is planispiral. Only trochospiral shells are sinistral or dextral

Cephalopods are planispiral. There are some rare cephalopods which are conispiral. Whenever you ask such questions from my video always mark the timeline where I made any such statement It will be easy for me to explain the context

The first diagram was a comparison between Brachiopoda and bivalvia. Brachiopoda has unequal valves while bivalves have equal valves. Since both Brachiopoda and bivalvia have two valves, it is important to differentiate between the two

Conch

I think you are taking about siphons!!! They are not cycons. They help in exchange of air and food when bivalves burrow. It is not found in all the bivalves

Watch my video on how to prepare for NET exam

ua-cam.com/video/xnuuEypHPwc/v-deo.htmlsi=gqFf8i_F1g2v2NI0

This video was recorded by the students in the class without any specific aid. So it is having a poor quality. But using headphones helps. Anyways, thanks for your wishes and complements but I believe that students should develop a habit of reading from good books. The videos and internet material are just subsidiary, which can be looked into after one develops concepts.

@@MrVikramsingh1 I agree sir, but for students who opt maths this is totally a new and challenging subject, I do go through books like P.C Jain, Amal Das Gupta, RM Black but after goin' through your videos, I've been watching since my under grad and noe I am in Masters final year and still I go through your videos and recommened to my juniors though lot of material is available on internet but still you manage to be the best of them. I request you to please upload Palaeontology lectures with all the aids needed by looking at the GSI perspective as no one explains as you did in your older videos. Thank you Best, Priyesh

They are same

@@MrVikramsingh1 hlo sir can you pls help in solving a concern of mine .I want to know what's the difference between msc geology , msc applied geology or mtech in applied geology .in various central universities across India geology is taught by these name in masters .so plz tell me how are they different and which is better

@@user-ne1hj6sd6s MSc Geology and MSc Applied Geology are the same, except that there might be some extra papers dealing with applied part of geology. MTech can be done only after PG as in IITs these courses are offered. Some universities also offer MTech. It is more of a specialised course

In normal terms, dorsal is the back and ventral is the abdomen or front part. But you have to understand that these terms differ for different groups. In trilobites the anterior is the part where the glabella points, in brachiopods the anterior is identified by the commissure line, in bivalve the anterior is where the foot lies, in Echinoidea the anterior is marked by peristome. Similarly when you talk about dorsal and ventral; in trilobites the dorsal side is on the top where you can see all the segments while ventral is underside; in Brachiopoda the larger valve is the ventral valve while smaller valve is the dorsal valve; in bivalves the dorsal side is marked by umbo while ventral is the commissure line. Interestingly the umbo of Brachiopoda is posterior, while in bivalve the pallial sinus (if present) is posterior. So there is a lot of variation. Read the book by Shrock and Twenhoefel for these things.

Asphalt is the material formed in the last phase of HC generation. It is plastic

@@MrVikramsingh1 that means the state in which asphalt exist is plastic is it? And is this state only confined with hydrocarbon that's solid liquid gase and plastic ? And can u plz mention which state we define as plastic i I mean by solid we means something that has rigidity hight melting point etc and liquid and gas have their own characteristics .in the same way what is plastic ? What are its characteristic ? Plz explain

@@user-ne1hj6sd6s it’s not exactly plastic. Rather it has a glassy solid texture. It exists from very viscous liquid to glassy solid. Asphalt is formed in the last stage of maturation of kerogen, at very high temperatures and is not an economically viable fuel.

Sir I want to ask u a different question which is not relevant to this topic the question is since we know about clay minerals they are phyllosilicate and and are formed by chemical weathering of silicate minerals . Also i know mica serpentine chlorite talc and clay all are phyllosilicate silicate .but the confusion I have is many books mention chlorite and mica under a 2:1 type of clay . Sir plz tell me is mica and chlorite a type of clay or seperate minerals which also undercomes phyllosilicate plz explain in detail

@user-ne1hj6sd6s first of all you should understand that phyllosilicate is a type of silicate group which has various types of minerals like the mica group, chlorite, kaolinite, montmorillonite, etc. The mica group is an important component of granites and metamorphic rocks. So it cannot be essentially called a clay mineral. So what is it that we can classify as clay minerals? Remember, clay a product of weathering which is formed by successive weathering of the rocks. Certain minerals who care formed during the successive chemical leaching/weathering of the minerals of hard rocks give rise to a new set of phyllosilicate minerals like chlorite, montmorillonite, smectite etc. These minerals have structure made of tetrahedral and octahedral sheets which are arranged as 1:1 or 2:1. They have the hydrous aluminium silicate as an essentials component, with varying concentration of Fe, Mg, alkali metals or alkaline earth metals

Marl is not a pure carbonate rock. It is actually a mixture of clays, carbonate and silt. So basically it is a hardened clay consisting of carbonate. You should read argillaceous rocks to read more about marl.

@@MrVikramsingh1 sir if so in which category do we put marls clastic sedimentary rock or carbonate sedimentary rock. I'm preparing for msc geology the material I have it mentions sandstone as argilaceous rocks where as silt stone clay stone and mud stone as arenaceous sedimentary rocks.another thing which I want to ask you is plz rectify my if I m wrong mudstone bis combination of silt and clay wnd when fisility develops in mudstone we call it shale

@user-ne1hj6sd6s Sandstone is an arenaceous rock, mudstone is an argillaceous rock. Siltstone is intermediate between sand and clay. Marl is a clastic rock. The best book to read sedimentary petrology is by Maurice Tucker.

Read Udden Wentworth scale to understand the concept of grain size. Then read about classification of rocks.

Hi there. It’s a good question. You should remember that the diagram shown here is the pyroxene quadrilateral in which Ca, Mg and Fe pyroxenes are classified. Jadeite (NaAlSi2O6) and aegirine (NaFeSi2O6) are Na-pyroxenes which are classified in a triangular diagram. That’s why it is not shown here.

@@MrVikramsingh1 by triangular diagrame do u mean the diagram which is above the pyroxene that's pyroxide or their is seperate traingular diagram for NA rich pyroxene is it?

en.m.wikipedia.org/wiki/Pyroxene

See this link. The part above the quadrilateral is pyroxenoid. Triangular diagram is different