An Introduction to the Study of Fabrics of Geological Bodies by Author B. Sander

By Author B. Sander

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In order to give a picture of resedimentation, of contemporaneous reworking and redeposition of the product in a unified geological time-space, we select a broad stream as such a region of formation. This may be supplied with sediment; in its domain, M, a mechanical and biogenetic deposit is formed, which is destroyed partly before, and partly after, it is lithified. In this domain construction, destruction, and transport go on physically simultaneously; just as, more simply, on a stream-bed whose sediments we consider as rocks.

Displacement at different depths in the earth's crust—whilst the rocks which have attained equilibrium portray no other events than that of the geological interim which cannot be further subdivided. As an example we may use an equilibrium rock (1) and a nonequilibrium rock (2), which as tectonites have undergone mechanical deformation. I. The deformation of the tectonite is either pre-crystalline, para-crystalline, or postcrystalline in relation to the crystallization of a specific mineral facies.

I. The deformation of the tectonite is either pre-crystalline, para-crystalline, or postcrystalline in relation to the crystallization of a specific mineral facies. If the deformation is pre-crystalline, we are concerned with a mechanical-chemical stirring-up (penetrative movement) with readjustment of a latent lack of equilibrium, as for example in the adaptation of the mineral facies of a crystalline magmatic rock to a deep zone or to a contact zone by tectonic penetrative movement; a similar adaptation of a sediment in which there is a lack of equilibrium between components; or tectonic transport with vertical components and ensuing consolidation by crystallization during a pause in the penetrative movement and transport.

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