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・ Rock Bottom (Wynonna Judd song)
・ Rock Bottom Creek
・ Rock Bottom Entertainment
・ Rock Bottom Remainders
・ Rock Bottom Riser
・ Rock Box
・ Rock Branch, Iowa
・ Rock Bridge High School
・ Rock Bridge Memorial State Park
・ Rock Bridge Township, Boone County, Missouri
・ Rock Brigade
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・ Rock burst
・ Rock bush quail
Rock butter
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・ Rock Camp, West Virginia
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・ Rock Canyon High School
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Rock butter : ウィキペディア英語版
Rock butter

Rock butter (also known as stone butter) is a soft mineral substance found oozing from alum slates.
It consists of native alum mixed with clay and oxide of iron, usually in soft masses of a yellowish white colour, occurring in cavities and fissures in argillaceous slate.
== References ==

* http://dict.die.net/rock%20butter/—has information from Webster's Revised Unabridged Dictionary (1913)
* (Rock Butter ), from the U.S. Bureau of Mines' ''Dictionary of Mining, Mineral, and Related Terms'' (1996), online at the Hacettepe University Department of Mining Engineering website.
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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Rock butter」の詳細全文を読む



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