id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
gc-463		gc-463		9	.pdf	application/pdf	4553	357	66	Magnetite is commonly partly altered to hematite, and in most rock samples these minerals occur together. In some samples relict fragments of clinopyroxenes are observed, and in sample l only their contours containing secondary minerals are preserved.	cache/gc-463.pdf	txt/gc-463.txt