Unconsolidated Sediments

Other Places Minerals Are Found

Weathering processes break large rocks into smaller ones, in processes that can work on surfaces (immediately resulting in fine particles) such as sandblasting, or in processes that gradually turn large rocks into smaller and smaller ones, such as the freezing and thawing of water in pores or crevices which can divide a large rock in two.

Weathering can also include dissolving water soluble minerals, often followed by the precipitation of those (or related) minerals at another site. The precipitation can be caused by evaporation increasing the concentration of a chemical (yielding evaporites such as halite), by a change of temperature and/or pressure that decreases the solubility of a chemical (the process that yields most quartz crystals), by a change of chemistry (PH changes, oxidation, etc.), or by the action of living creatures such as diatoms (eventually yielding chalk or limestone beds).

The initial result of many weathering processes are unconsolidated sediments, but these loose accumulations of material can also form from volcanic processes. Over time, most unconsolidated sediments will harden into sedimentary rocks.

This site awarded
See Steve's video interview about asteroid capture at Moonandback:
Part 1
Part 2
Part 3

See Steve's blog

On The Future
Of Humanity

(recent post)
A Project Plan for Space Based Solar Power

can make a difference! Help President Obama, NASA, and the people of Earth. See the
Apophis Challenge for solutions to
- Global Warming
- Global Energy
- Man in Space
- Preventing the next Extinction Level Event


Copyright ©1995-2014 by Amethyst Galleries, Inc.
Site design & programming by galleries.com web services