from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various medium-grained to coarse-grained metamorphic rocks composed of laminated, often flaky parallel layers of chiefly micaceous minerals.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any crystalline rock having a foliated structure and hence admitting of ready division into slabs or slates.
from the GNU version of the Collaborative International Dictionary of English
- n. Any crystalline rock having a foliated structure (see foliation) and hence admitting of ready division into slabs or slates. The common kinds are mica schist, and hornblendic schist, consisting chiefly of quartz with mica or hornblende and often feldspar.
from The Century Dictionary and Cyclopedia
- n. A rock the constituent minerals of which have assumed a position in more or less closely parallel layers or folia, due not to deposition as a sediment, but—in large part, at least—to metamorphic action, which has caused a rearrangement or imperfect crystallization of the component minerals, or the formation of new ones, these. in the course of the process, having assumed the parallel arrangement characteristic of the rock.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any metamorphic rock that can be split into thin layers
Through the years, the wineries have carved amazing steep terraces for grape growing along the banks of the Douro, and there is a unique soil called schist.
It is here, on top of a thin layer of flaky ocher-colored rock, known as schist, that the vine is at its most unexpected.
The flake mica produced in the U.S. comes from several sources: the metamorphic rock called schist as a by-product of processing feldspar and kaolin resources, from placer deposits, and from pegmatites.
A person floating along the Colorado River can see, at river level, a distinctive rock type called schist.
The gold-bearing rock is a heavy ledge of brown, ferruginous mica-schist, which is impregnated with iron pyrites in a state of minute subdivision, and abounds in garnets.
Hand-trenching tied at least some of these float samples into un-deformed quartz veins within the weathered bedrock schist, which is covered in the area by 0.5 to 12.55 m of overburden.
We can also ignore metamorphic rocks, such as schist and marble, for they have undergone either superheating or extreme pressure since their initial formation.
Mount Athos, literally "holy mountain," is a 36-mile finger of granite and schist culminating in a 6,670-foot peak of white crystalline limestone that is visible 100 miles away.
But schist doesn't look like soil at all; it's layers and layers of flinty rocks.
I'm casting for bass in a gorgeous little cove bordered on three sides by steep outcroppings of schist topped by thick woods of oak, maple, birch, pine, and weeping willows whose branches drape almost to the shoreline.