File:Olivine melilitite lapillistone (Hegau Volcanic Province, Late Miocene, 10 Ma; Howenegg, Rhine Graben, southwestern Germany) 1 (14817993170).jpg
Original file (1,403 × 815 pixels, file size: 1.61 MB, MIME type: image/jpeg)
Captions
Captions
Summary[edit]
_1_(14817993170).jpg&action=edit§ion=1){kind=link}
| Description |
Olivine melilitite lapillistone (field of view 5.3 cm across) with grains of olivine melilitite (gray & brown) cemented together by calcite (yellow). The lapilli grains (= gray & brown chunks) are composed of porphyritic olivine melilitite. This is one of the strangest & visually distinctive volcanic rocks I’ve come across. This is an olivine melilitite lapillistone. This means it is a clastic-textured, extrusive igneous rock dominated by grains larger than ash (>2 mm in size). Grains of this size are called lapilli. A lapillistone (lapilli tuff) is a deposit of lapilli that’s been lithified - in this case, the grains have been cemented together by calcite. The lapilli in this sample range in shape from subrounded to angular. There's quite a few <2 mm grains in the rock as well. The lapilli grains themselves are composed of an unusual igneous rock called porphyritic olivine melilitite, which consists of a mix of olivine, diopside pyroxene, and melilite (calcium sodium magnesium aluminosilicate - (Ca,Na)2(Al,Mg)(Si,Al)2O7). Locality & Geology: Howenegg, Hegau Volcanic Province, Rhine Graben, southwestern Germany. Age: early Late Miocene, 10 m.y. |
| Date | |
| Source | Olivine melilitite lapillistone (Hegau Volcanic Province, Late Miocene, 10 Ma; Howenegg, Rhine Graben, southwestern Germany) 1 |
| Author | James St. John |
Licensing[edit]
_1_(14817993170).jpg&action=edit§ion=2){kind=link}
- 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@N05/14817993170 (archive). It was reviewed on 4 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:40, 4 November 2019 | | 1,403 × 815 (1.61 MB) | Ainz Ooal Gown (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_1_(14817993170).jpg&oldid=724359568){kind=link}