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What type of rock has light and dark layers - Answers


foliated. ... What is a type of metamorphic rock that has parallel layers? Foliated rock has parallel layers. .... What rock has parallel bands of dark and light mineral grains?

Rock Key


If there are a lot of pebbles mixed with the sand, it is called gravel. .... The rock has crystals, layers that look like ribbons or bands of minerals running through it, and is kind ... Is the rock mostly light or medium gray, not very dark gray or black?

Chapter 4 Rocks and Minerals - Volcano World


This layer of rock extends down to 40 miles from the surface of the earth. ... The lava has cooled and is now a volcanic rock called basalt. .... Some minerals sparkle in the light while others are dull and boring! ... If the mineral shows a scratch mark from one of the testing materials the mineral is said to be less hard than the ...

Rocks in the Field - Index - Department of Earth Sciences


The images are classified according to rock type (sedimentary, igneous, ... Sandstone In this outcrop you see a sequence of sandstone layers. .... They have been tightly folded, and you can see that the rock has behaved as if it was quite soft, like putty. ... The light streaks are feldspar and quartz, the dark bands are mica and ...

Metamorphic Rocks


Distinguish between foliated and non-foliated metamorphic rocks. • Distinguish between ... and the formation of bands or layers of like minerals. METAMORPHIC  ...

Metamorphic Rocks


The light and dark bands (gneissic banding) are alternations of felsic vs. mafic layers. Slate is a product of low grade metamorphism (not terribly great burial ...

Fairly Simple Rock Identification


The printed exercises has several repetitions so that the teacher can copy and ... If the minerals in the rock have cleavage, they will give a bright, flat reflection of .... bands, Light and dark Phaneritic minerals in light and dark bands or layers.

Ch 21 22 Intro Metam and Classif mod 8.ppt

www.kean.edu/~csmart/Petrology/Lectures/Ch 21 22 Intro Metam and Classif mod 8.ppt

Metamorphism is the transformation of rock by temperature and pressure ... Increasing temperature has several effects ... If the minerals are flat, such as sheet-like Micas, their parallel orientation gives a layered look; layering unrelated to the .... Composed of light-colored feldspar layers with bands of dark mafic minerals.

Foliated Metamorphic Rocks | Mineralogy4Kids


Foliated metamorphic rocks are formed within the Earth's interior under ... slightly more crystallized which gives the rock a shiny appearance; layers may also ... and pressures; coarse grained texture of alternating light and dark mineral bands .

Metamorphic Rocks


3- Foliation – The alignment of platy minerals or alternating layers of light (felsic) and dark ... has properties of both a gas and a liquid. Supercritical ... minerals align or alternating light and dark layers form, giving the rock a ... Distinguished based on composition, but may be foliated if subjected to ... form compositional b...

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Metamorphic Rock Classification - faculty at Chemeketa


Foliation refers to flat or wavy planar features (looking like layers) caused by the ... Foliation may also look like alternating bands of light and dark minerals. In contrast, a nonfoliated rock has interlocking grains with no specific pattern. Foliated ...

Igneous Rocks


Both magma and lava cool and harden to form igneous rocks. ... The word " texture" has nothing to do with how the rock feels. ... Depending on the proportion of light minerals to dark minerals, igneous rocks can be broken into four main types: felsic, ... Each layer of sedimentary rock is like a chapter in the history of the e...

Rock and Mineral identification Flashcards | Quizlet


(dark rocks) Extrusive Igneous Rock Color: black or dark. Streak: Layers: ... Color: always going to be grey (light or dark) ... Other: sometimes has bands (stripes) of different colored minerals caused by the reorganization of minerals during ...