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・ Spruce Home, Saskatchewan
・ Spruce Island (Alaska)
・ Spruce Knob
・ Spruce Knob Lake (West Virginia)
・ Spruce Knob-Seneca Rocks National Recreation Area
・ Spruce Lake Bog
・ Spruce Lake Protected Area
・ Spruce Lake, Saskatchewan
・ Spruce Lane Acres, Alberta
・ Spruce Meadows
・ Spruce Mountain
・ Spruce Mountain (Nevada)
・ Spruce Mountain (West Virginia)
・ Spruce Mountain High School
・ Spruce Pine
Spruce Pine Mining District
・ Spruce Pine, Alabama
・ Spruce Pine, North Carolina
・ Spruce Point, California
・ Spruce Production Division
・ Spruce Railroad Trail
・ Spruce River
・ Spruce Run
・ Spruce Run (Buffalo Creek)
・ Spruce Run (Little Fishing Creek)
・ Spruce Run Earthworks
・ Spruce Run Recreation Area
・ Spruce Run, New Jersey
・ Spruce sawflies
・ Spruce Street (Manhattan)


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Spruce Pine Mining District : ウィキペディア英語版
Spruce Pine Mining District

The Spruce Pine Mining District is a swath of the valley of the North Toe River in the Blue Ridge Mountains of northwestern North Carolina that is home to one of the richest deposits of gems and minerals in the world. Mined for its mica, kaolin, quartz and feldspar, the district provides much of the raw materials used in plumbing fixtures. Spruce Pine district is one of the largest suppliers of high-purity quartz, which is used in the manufacture of silicon chips.
The district is named after the town of Spruce Pine, which is located in the middle of the region and is the hub of major mining activity there. The district is approximately long and wide.
==Geology==
The pegmatites intruded into the Ashe Formation. The pegmatites and country rock are part of the Spruce Pine thrust block, the highest thrust sheet of the Blue Ridge belt, the latter being part of the Tugaloo Terrane which was accreted to North America during the Taconic Orogeny.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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