Folds and Faults

Social Science
Class 9
3D model
English · Hindi

Folds and Faults: a 3D model for Class 9 Social Science, covering Horizontal forces squeeze rock layers until they buckle into folds: up-folds are anticlines, down-folds synclines., Fold mountains such as the Himalaya, the Alps and the Andes formed where two plates pushed layers of rock together., The Himalaya rose as the Indian plate drove into the Eurasian plate, crumpling the Tethys Sea sediments between them., A fault is a crack along which rock blocks move; in a normal fault, tension lets one block slip down the fault slope., When the land between two faults sinks, a rift valley (graben) forms, like the Narmada valley and the East African Rift..

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Also called

folds · faults · anticline · syncline · normal fault · hanging wall · rift valley · graben · block mountain · horst · fold mountains · Himalaya formation · Tethys Sea · compression · tension · rock strata · endogenic forces · वलन · भ्रंश · भ्रंश घाटी · हिमालय

Topics

Horizontal forces squeeze rock layers until they buckle into folds: up-folds are anticlines, down-folds synclines.
Fold mountains such as the Himalaya, the Alps and the Andes formed where two plates pushed layers of rock together.
The Himalaya rose as the Indian plate drove into the Eurasian plate, crumpling the Tethys Sea sediments between them.
A fault is a crack along which rock blocks move; in a normal fault, tension lets one block slip down the fault slope.
When the land between two faults sinks, a rift valley (graben) forms, like the Narmada valley and the East African Rift.
When the blocks on both sides sink, the land between them stands up as a block mountain (horst), like the Black Forest.
Folding comes from compression (pushing together); faulting comes mostly from tension (pulling apart).
The Himalaya still rise a few millimetres a year because the Indian plate keeps moving north.

About this model

A GLB file of about 304 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Model, science and animation: Lably (built procedurally with three.js; no downloaded meshes). | CC BY 4.0. Original geometry and animation made for Lably.

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