GE0LOGY/ PALAEONTOLOGY LECTURE-4, MODES OF PRESERVATION GATE | CSIR-NET| GSI | IIT JAM GEOLOGY

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[@Dibyendu.M]

1. When some parts of a substance dissolve and the substance becomes lighter, the process is called leaching. 2. When a substance is filled by secondary substance or mineral and the primary substance becomes heavier, the process is called permineralization. 3. a. quick detachment from the environment, b. unique condition, e.g., cool environment to preserve soft parts, because it slows down the decomposition. 4. Carbonization is a process where carbon remains intact and all other substances/ material are removed or altered. 5. Petrification is a process where original structure of a substance remains unchanged, but the composition is changed. 6. Unaltered hard parts are fossils of an organism which has suffered no change (chemical or compositional) during fossilization.

[@sohidul..alam..473]

Vowww ,great understanding ,neet it to understand evolution

[@naseebahad]

Sir, the way you r presenting every topic is unique and most understandable to any level of lQ. I appreciate the teaching capacities and the skills of you Sir. Really an INNOVATIVE efforts to make students learn. An excellent teacher indeed,have the adequate grip on the subject.

[@surbhinath2504]

1) leaching is a process in which dead organism react with groundwater leading to dissolution , lead to creation of cavity hence making it lighter than original. 2) initially when the dead organism contain void space and it gets filled with secondary mineral making it heavier called permineralization. 3) To preserve soft parts climate play an imp. Role colder places covered with ice will act as natural refrigerator to preserve the soft parts as ice lighter than the sediments which is covering the dead organism eg: Siberian ice preserved mamuth in Pleistocene age. 4) Except carbon when all the material which make up the organism are removed usually under high p,t conditions called carbonisation eg: coal. 5) Petrification is a Fossil formation process in which molecule to molecule or volume to volume replacement occurs in such a way that original structure remain same but chemical composition changes due to chemical replacement. 6) Unaltered hard parts are those in which original composition of organism remain same eg: teeth.

[@fardeenKhan_amu]

Amazing lectures, sir 11:20 jaldi jao namaz choot jayegei😅

[@shreymaurya3637]

Adorable!! Needs more such videos in geology!! Please sir!

[@mahimarawat5110]

1- it is the alteration process in which some parts of existing material dissolve or degradate and lower the weight of material. 2-it is the process when infilling of secondary minerals take place in the voids of material and hence add weight. 3-natural freezing,tree resin etc 4-it is the alteration process in which all the materials except Carbon got removed ex- formation of coal 5-it is the chemical alteration process in which original structure remain unchanged and chemical composition change ex petrified wood akal fossil wood park jaisalmer rajisthan. 6-skeleton,jaws,teeth etc

[@mansirautela3307]

1)LEACHING-- Leaching means Dissolution.In this process dead oraganism (heavy/filled body parts) generally composition is calcerous become lighter after coming in contact with groundwater which is acidic in nature. 2)PERMINELIZATION-- means depositions. In this process lighter body parts converts into heavier ones after coming in contact with groundwater which is acidic in nature due to infilling of salt. 3)As ice act as natural refrigerator. So,soft parts can easily preserved easily in ice . Eg- Siberian ice age Preserved of elephant and rinosour has been found which is preserved in Pleistocene epochs. 4) CARBONIZATION-- Process in which all materials except Carbon get removed.eg--formation of coal. 5)PETRIFICATION-- process in which organic material will remove by silica at such sophisticated level such that replacement will take place molecule to molecule and volume to volume .As a result original structure/volume will remain same but chemical composition changes due to chemical replacement. 6) UNALTERED--No chage in fossil composition after preservation it remains same.

[@animeshmishra9034]

1)Leaching is a dissolution process where the initially heavier fossil is converted into lighter one. It causes alteration of hard parts 2)Permineralization is a depositional process where initially lighter material is converted into heavier one due to in filling of secondary mineral. 3)Peservation of softparts is rare but quick rapid burial or natural freezing will be ideal for softparts preservation. 4)Carbonization is an alteration process in which except carbon all the organic materials get removed. 5)Petrification is a chemical replacement where the original structure wil remain intact but the chemical composition changes due to chemical replacement. 6)Unaltered hardparts are parts of the organism fossilized as the exact same composition as they where formed. No change in chemical composition.

[@sgmusicndpoetry]

Sir stratigraphy

[@srikantakumarsahu1587]

1-Leaching is a dissolution process.It alters heavier material to lighter one 2-Permineralisation is a deposition process.It converts lighter material to heavier one 3-first it should be detach from atmospheric contact followed by unique environmental conditions which preserve it in frozen state 4-Replacement process in which all organic matter is replaced except carbon. 5- In petrification original structure of the fossil remains same while it's chemical composition changes 6- Bones, claws,jaws, skeleton,skull

[@anonymouslatte56]

1. Leaching = Act of change of heavier body parts into lighter ones after coming in contact with natural degrading agents like groundwater which is acidic in nature. 2. Permineralization = Act of change of lighter or hollow parts of fossil into heavier after coming in contact with groundwater, in the phenomena it will precipitate its salt & anionic complexes resulting in heavier weights. 3. In order to preserve soft parts there must be complete detachment from natural environment and rapid permanent covering the body under unique conditions. 4. Carbonization = A natural replacement process in which all other organic matter gets replaced instead of Carbon. Ex - coal. 5. Petrification = Volume to Volume and molecule to molecule replacement of parts resulting in change of chemical origin but preserving the aforesaid structural origin. 6. Unaltered hard parts are the original composition of the organism better termed as original skeleton.

[@AmanSharma-un9cy]

Sir Paleontology ki koi acchi book suggest karenge please?

[@MdAkram-ti4tm]

Zabardast ho ap..Easy to understand the concept

[@sikhamohanta2974]

1)Leaching is a dissolution process where the initially heavier fossil are converted into lighter one. 2)Permineralization is a depositional process where initially it was lighter fossil but it results into a heavier fossil due to infilling of secondary material. 3) Dissil soft parts are preserve by quick &rapid burid or in natural refrigerator ice. 4) Carbonization- It is a replacement process where accept carbon all organic matter are removed. Ex- coal 5) Petrification- Original structure of fossil will remain unchanged but chemical composition get changed dye to chemical replacement. 6) The unaltered hard part are organism preserved in same composition. No changes in original composition.

[@rituc-2545]

Thanku so much sir ,your way to teach is excellent ,now easy to understand

[@krishnanandchaudhary8511]

4:-Carbonization -except carbon all other material is removed .ex coal 5:-petrifiction- replacement of organic material by silica in such a sophisticated bay as volume to volume and molecular to molecular replacement takes place causing no change in initial structure 6:-Unaltered The original comp.orgnisum remain unchanged

[@mjkumar2507]

Who like his teaching style like here👇

[@krishnamanjari5786]

1. Leaching is a dissolution process occured by ground water and it altered intially heavier hard part to lighter one. 2. Permineralization is a process in which infilling or precipitation of secondary material occurs.and it altered initially lighter materials to heavier one. 3. Immediate detachment from atmosphere, Rapid burial by ice cover. 4.carbonization is a process expect carbon all other organic matter are removed. 5. Petrification is a process in which volume to volume or molecule to molecule replacement occurs so it's original structure remain unchanged bt chemical composition changes. 6. Unalter hardparts are the preserved hard parts of organism without any change in composition. Tq sir🙏

[@pratibha2125]

Sir plzz guide where we can access lectures U upload 4 lectures 5 ?? .... If i have have 2 paid then plzz tell

[@gipsaa3440]

Bhaiii gud to see you😃😃😃

[@chiranjeebdas4083]

1:leaching is a dissolution process occured by groundwater and it alters initially heavier hard parts to lighter ones. 2:Permineralization is a process in which infilling or precipitation of secondary materials occurs and it alters initially lighter materials to heavier one. 3:Immediate detachment from atmosphere and rapid burial by ice cover. 4:Carbonization is a process in which except carbon all other organic matters are removed. 5:Petrification is a process in which volume to volume or molecule to molecule replacement occurs so that it's original structure remains intact but the chemical composition changes. 6:Unaltered hard parts are the preserved hard parts of organism without any change in it's composition. Tqqq sir🙏🙏🙏

[@shivaparvathy8553]

1- Leaching is a dissolution process were initially heavier body parts become lighter by removal of material from it. 2- Permineralization is a process of precipitation in which initially lighter body parts become heavier by infilling of secondary minerals. 3- Detachment from the environment by rapid burial in unique conditions such as getting entrapped in ice ( Mammoth of Siberia) or in amber ( Fossilized insects preserved in amber) 4- Carbonization : An alteration process in which except carbon all organic matter are removed. e.g. Formation of coal 5- Petrification : Chemical replacement process in which organic material will be removed by silica leading to change in chemical composition but original structure remains unchanged. 6- Unaltered hard parts are fossilized hard parts that remain unchanged in original chemical composition.

[@shreymaurya3637]

Literally very easy to comprehend your concept ! Please give us info. About all topics in paleontology ! Please...🤗😍

[@vikramsingh-tt9pe]

Khub bhalo

[@anindyadas6480]

In carbonization process except carbon all organic compounds are removed but there are chemical substances like volatile gass as methane, ethylene etc are found. I can't understand this definition.. properly..sir.

[@surendradukiya184]

Sir aapki offline coaching kha chalti h

[@gufrananaz8410]

Thank you sir

[@pratibha2125]

Sir aap lecture upload krdo paleontology lecture 5

[@pratibha2125]

Lecture 5

[@GEOKHAN]

Tomorrow

[@pratibha2125]

Thankew sir

[@yuvrajkokare1840]

Sir paleontology ke notes kaha milenge

[@kkproduction158]

Sir paleontology ke notes dijiye

[@shwetagee7780]

1- leaching is a process in which original skeletal becomes hollow due to dissolution of matter inside it. It causes distillized fossil. 2- perminerallization is infilling of pores. It will make the fossil heavier due to precipitation of other minerals inside it. 3- in order to preserve soft Fossil , we need very low temperature or we can say ice region. 4- carbonisation is a process in which some portion of original skeletal matters lost and carbon got precipitate or we can say that carbon will replace the original skeletal matters. 5- petrifaction is a process in which slow replacement i.e. volume to volume or even molecule to molecule replacement takes place and the morphology or structure remains unchanged. 6- unaltered hard parts are those Fossil in which no chemical alteration takes place.

[@pratibha2125]

Sir plzz replyy

[@krishnanandchaudhary8511]

Good morning sir