Webster's Revised Unabridged Dictionary
Gr., fr. zeche, a mine + stein, a stone
Chambers's Twentieth Century Dictionary
Ger.,—zeche, a mine, stein, a stone.
The next formation I have to mention is one which appears to possess most of the characters ascribed by German geologists to the zechstein.
"Narrative of a Second Expedition to the Shores of the Polar Sea" by John Franklin
Zechstein, or Lower Zechstein.
"A Manual of Elementary Geology" by Charles Lyell
San Leon Energy PLC said it made an oil discovery in Zechstein Main dolomite in southwestern Poland and is equipping it for near-term production on an electric submersible pump.