Although these never contain quartz, but feldspar is usually present, though there are certain groups of leucite lavas which are non-feldspathic.
22.
Another feature recorded during field on observations is that granite has become the feldspathic schist near the boundary on the northern side of the cape.
23.
A quartz-porphyry, for example, and a fine feldspathic sandstone, may both be metamorphosed into a grey or pink mica-schist.
24.
On the Moon, the feature is seen as a widely distributed absorption that appears strongest at cooler high latitudes and at several fresh feldspathic craters.
25.
The bed rock, where it has been seen, consists of dark feldspathic, graphitic mica-schist, similar to that of Midnight Mountain.
26.
If the relative abundances of different sedimentary rock fragments cannot be obtained, then the rock is called a sedarenite, subsedarenite or feldspathic sedarenite, respectively.
27.
This conglomerate is composed of a grey feldspathic sand matrix and well-rounded pebbles and cobbles of quartzite, granite, felsite, and quartz monzonite.
28.
The bottom periphery of caldera, 0.5 km wide, is mostly built of feldspathic rocks ( fenites ), and little or no carbonatite.
29.
The best known American variety of bluestone is a feldspathic sandstone, which is produced in hundreds of small quarries in adjacent areas of Pennsylvania and New York.
30.
"' Bone china "'is a type of soft-paste porcelain that is composed of bone ash, feldspathic material, and kaolin.
