File:Large mica crystal in pegmatitic granite (Ruggles Pegmatite, Devonian; Ruggles Pegmatite Mine, New Hampshire, USA) 1 (8290567917).jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file (634 × 960 pixels, file size: 532 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description

Large mica crystal in pegmatitic granite in the Devonian of New Hampshire, USA.

Spectacular mineral collecting can be had at the Ruggles Pegmatite Mine near Grafton, New Hampshire, USA. The Ruggles Mine started off in the early 1800s as a muscovite mica mine, but it's now a tourist site. Its walls have beautiful exposures of a mid-Paleozoic granite pegmatite, having unbelievably large crystals. Well over 100 minerals have been reported from this pegmatite, but the most common rock-forming minerals here are quartz, potassium feldspar, biotite mica, muscovite mica, and schorl tourmaline. The Devonian-aged pegmatite at Ruggles Mine is one of several in the Grafton Pegmatite Field. These intrusions are part of the New Hampshire Plutonic Series, emplaced during the Acadian Orogeny.

One of the most visually intriguing aspects of the Ruggles Pegmatite is the huge masses of both biotite mica and muscovite mica.

Locality: Ruggles Pegmatite Mine, near Grafton, southern Grafton County, western New Hampshire, USA
Date
Source Large mica crystal in pegmatitic granite (Ruggles Pegmatite, Devonian; Ruggles Pegmatite Mine, New Hampshire, USA) 1
Author James St. John

Licensing

[edit]
w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/8290567917 (archive). It was reviewed on 12 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

12 November 2019

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current04:15, 12 November 2019Thumbnail for version as of 04:15, 12 November 2019634 × 960 (532 KB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

There are no pages that use this file.