In epidote it has been shown that the two directions of maximum absorption which lie in the plane of symmetry are not even at right angles.
Belonging to the same isomorphous group with epidote are the species piedmontite and allanite, which may be described as manganese and cerium epidotes respectively.
A rock composed of quartz and epidote is known as epidosite.
Illustration] Epidoteis an abundant rock-forming mineral, but one of secondary origin.
Biotite, if present, is brown; epidote is yellow or colourless; rutile, apatite and quartz all occur with some frequency.
Calcareous spar occasionally occurs in small cavities; and nests and layers of epidote are common.
Epidote likewise occurs in the gneiss in thin layers, parallel to the foliation of the mass.
The felspar breaks up into a mosaic in which albite, epidote or zoisite, quartz and garnet may often be identified.
If felspar be present also, epidote may form, while part of the felspar recrystallizes as a species of the same mineral richer in alkalies or as mica.
All these types are holocrystalline, and range in texture from coarse granite with augen an inch long down to a fine epidote granite with scarcely visible crystals.
The epidote occurs in the form of lenses arranged parallel to the planes of schistosity, reaching as high as five feet in thickness and grading from that down to the size of minute grains.
A general separation can be made into an epidotic division characterized by an abundance of macroscopic epidote and a non-epidotic division with microscopic epidote.
The resulting soil, where not too heavily encumbered with the epidote blocks, is rich and well adapted to farming, on account of the potash and calcium contained in the epidote and feldspar.
Accompanying this lenticular epidote is a large development of quartz in lenses, which, however, do not attain quite such a size as those of epidote.
Parallel with the micas that cause the schistosity, the growth of the quartz and epidotelenses took place.
These are dependent upon a secondary characteristic, viz, the presence of epidote in large or small quantities.
Both the quartz and epidote are practically insoluble and lie scattered over the surface in blocks of all sizes.
At the eleventh portage Doctor Bell examined a number of veins of quartz holding epidote and hornblende, but no ores could be detected.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "epidote" in a variety of sentences. We hope that you will now be able to make sentences using this word.
