Principally, as by far the majority of the world's caves are formed in limestone uplands, by dissolution of the rock's calcium carbonate by slightly acid rain-water seeping through the joints and bedding-planes. These, and other discontinuities such as faults and shale bands, provide a "leak path" for the initial penetration of water into the rock mass, though the water also has to find an outlet at a lower altitude from the inlet for flow to take place.
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In time the water forms discrete conduits along the joints etc through the rock, and these coalesce to develop passages and chambers. The passages will continue to develop as long as they carry their streams.
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This can happen only in soluble rocks: limestone and gypsum. Caves in other, insoluble, rocks are developed by other mechanisms.
A joint is a fracture in a rock where there has not been any significant movement along the fracture surface. A fault is a fracture where there has been movement along the fracture surface. Joints do not displace the rock on either side of the fracture, while faults involve displacement.
A fracture in rock along which there has been no movement is called a joint. Joints form when rocks are subjected to stress but do not move or shift along the fracture surface. Joints are common features in many rock formations and can affect the overall stability and behavior of the rock mass.
A joint is a crack or break in the bedrock along which no movement has occurred, distinguishing it from a fault which does involve movement. Joints are commonly found in many types of rocks and are a result of stress within the earth's crust. Joints can affect groundwater flow, weathering, and the formation of landscapes.
Joint fault is an extense shear joint in basalt flows, dominantly layer-parallel and probably generated initially by the differential inertial movements inside the cooling lava flow of portions with different melt-viscosities. Their planar part is probably conditioned by the isotherms distribution, while curved segments may be related to brittle-ductile fissure propagations along their edges.
The gap itself between two parted rocks would be called a fissure. This can happen through weathering, stress applied on two different points causing a overwhelming pressure at a single point (which would usually occur in the center of these two applied pressures, but may be slightly off due to a weaker point off median.), extreme heat (artificial, or natural such as wildfires, lightning....), vibration, and other elements that gradually weaken the specific point to breaking.
The joints, bedding-planes and faults provide conduits for water to penetrate the limestone mass; and it is the water, slightly acidified by absorbed carbon dioxide, that dissolves the rock to form the cave.
Number of planes in the uniaxial joints?
This joint allows movement in many planes.
A multiaxial joint is a type of synovial joint that allows movement in multiple planes, such as the shoulder joint (ball and socket joint). These joints have three or more axes of rotation and enable movement in all three planes of motion at the same time.
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Metacarpophalangeal
No. An amphiarthrodial joint is a cartilaginous joint that allows minimal movement in a lot of different planes. The ball-in-socket joint is a triaxial synovial joint that allows movement in all three planes around all three axis.
explain how it can help indian sociaty
A multiaxial joint is a type of synovial joint. The x-axial refers to how many planes of the movement the specific joint provides, so in the case of a multiaxial joint, that means it provides movement in many planes of movement (multiaxial usually refers to three, which can then also be stated as triaxial).
The glenohumeral joint moves in multiple planes of motion, including flexion/extension, abduction/adduction, and internal/external rotation. This allows for a wide range of movement in the shoulder joint.
these muscle groups either extend a joint, extensors) or contract the joint (flexors). triceps extend the elbow joint, biceps bend the elbow joint.
Simply stated, the joint sector is a form of partnership between the public sector an the private sector