- n. Plural form of feldspar.
“It was at this epoch that the rocks called feldspars, syenites, and porphyries appeared.”
“It is home to glasses, pyroxenes, feldspars, oxides, olivines, troilite and metals in its lunar soil, which is called regolith.”
“The minerals included in this group are orthoclase, microcline, and the plagioclase feldspars.”
“Many common minerals, including feldspars, contain aluminum, but extracting the metal from most minerals is very energy-intensive, and therefore expensive.”
“Of course plagioclase feldspars are also one of my favorites so I might be a little partial here.”
“In this rock, you get the recrystallization and foliation of quartz, feldspars, micas, and amphiboles into alternating light - and dark-colored bands.”
“All of these rock types are light in color because of the dominance of quartz, potassium and sodium feldspars, and plagioclase feldspar minerals (Figure 1).”
“GABBRO: A black,course-grained,intrusive igneous rock,composed of calcic feldspars and pryoxene.”
“So far she has slate, oolitic limestone, banded sandstone with calcite cement, a few feldspar crystals though ashamedly I forgotten how to tell feldspars apart with out the add of thin sections and a microscope!”
“Well, when dilational stress levels rise, microfractures open in the diorite and release trace levels of radiogenic argon from feldspars into the atmosphere.”
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