File:Amphibolite inclusions in Giants Range Batholith (Neoarchean, 2.674-2.682 Ga; Confusion Hill roadcut, just north of Virginia, Minnesota, USA) 1 (23640848356).jpg
![File:Amphibolite inclusions in Giants Range Batholith (Neoarchean, 2.674-2.682 Ga; Confusion Hill roadcut, just north of Virginia, Minnesota, USA) 1 (23640848356).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c7/Amphibolite_inclusions_in_Giants_Range_Batholith_%28Neoarchean%2C_2.674-2.682_Ga%3B_Confusion_Hill_roadcut%2C_just_north_of_Virginia%2C_Minnesota%2C_USA%29_1_%2823640848356%29.jpg/800px-thumbnail.jpg?20191205055359)
Original file (4,000 × 3,000 pixels, file size: 4.44 MB, MIME type: image/jpeg)
Captions
Captions
Summary
editDescriptionAmphibolite inclusions in Giants Range Batholith (Neoarchean, 2.674-2.682 Ga; Confusion Hill roadcut, just north of Virginia, Minnesota, USA) 1 (23640848356).jpg |
Amphibolite inclusion in tonalite & diorite in the Precambrian of Minnesota, USA. Light-colored rock = tonalite Dark-colored rock = diorite Irregularly-shaped black masses = amphibolite This is part of a famous outcrop in northeastern Minnesota - Confusion Hill. These are intrusive igneous rocks of Late Archean age, part of the Giants Range Batholith. The dark-colored material is diorite, a phaneritic, intermediate intrusive rock composed principally of sodic plagioclase feldspar, hornblende amphibole, and biotite mica. Other minerals that can be in diorite include pyroxene, minor quartz, minor potassium feldspar, and various trace minerals. The light-colored rock is tonalite, a phaneritic, felsic intrusive igneous rock having sodic plagioclase feldspar, quartz, and one or more mafic minerals such as amphibole and pyroxene. Lithologies intermediate between tonalite and diorite (i.e., quartz diorite) are also present at this site (see Peterson et al., 2005). Some specific sites at this outcrop show that tonalite intrudes diorite, while in other areas of the same outcrop, the diorite intrudes the tonalite. This mutually cross-cutting relationship is consistent with magma mingling during emplacement (Peterson et al., 2005). The irregularly-shaped, black-colored masses seen above are amphibolite (metabasalt), which are metamorphosed basalt lava flows that predate intrusion of the Giants Range Batholith. Metamorphosed sedimentary rocks are also present as inclusions at the Confusion Hill Outcrop. Geologic unit & age: Giants Range Batholith, Neoarchean, 2.674-2.682 Ga [The light-colored tonalite is part of the Lookout Mountain Tonalite, which is a component of the Giants Range Batholith.] Locality: Confusion Hill outcrop - roadcut on the eastern side of northbound Rt. 169/Rt. 53, immediately north of roadside rest stop, northwestern side of Lookout Mountain, Laurentian Divide, just north of the town of Virginia, central St. Louis County, northeastern Minnesota, USA (47° 34' 40.71" North, 92° 32' 37.21" West) Site-specific info. from: Peterson et al. (2005) - Architecture of an Archean greenstone belt: stratigraphy, structure and mineralization. Minnesota Geological Survey Guidebook 21: 154-180. |
Date | |
Source | Amphibolite inclusions in Giants Range Batholith (Neoarchean, 2.674-2.682 Ga; Confusion Hill roadcut, just north of Virginia, Minnesota, USA) 1 |
Author | James St. John |
Licensing
edit![w:en:Creative Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![attribution](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
- 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@N05/23640848356 (archive). It was reviewed on 5 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 December 2019
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 05:53, 5 December 2019 | ![]() | 4,000 × 3,000 (4.44 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon PowerShot D10 |
Exposure time | 1/500 sec (0.002) |
F-number | f/4.5 |
ISO speed rating | 80 |
Date and time of data generation | 15:05, 10 June 2015 |
Lens focal length | 14.303 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
|
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 23:08, 10 December 2015 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 15:05, 10 June 2015 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 8.96875 |
APEX aperture | 4.34375 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 4.34375 APEX (f/4.51) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Landscape |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 16:08, 10 December 2015 |
Unique ID of original document | 40644882F7F69D373DF29ACEAA011F83 |