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Geology
Volcanism
Added: 18-1-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Volcanism

Comments:
A so called dyke on the south coast of the Westfjords. These dykes occur because a crack is filled by molten rock. Typically several dykes occur parallel to each other.

Locatie
Photographed in: Westfjords, Iceland
Date: 2004

Photo data
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0012

 
Geology
Volcanism
Added: 18-1-2008
Last modified: 18-2-2014 by webmaster
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Geology
Category: Volcanism

Comments:
By uplifting of the surface this fissure in the rock, which was formed in the 18th century near Laki (road 206) where a large fissure eruption occured. As a result of this eruption, many cubic kilometers of volcanic ash and lava were erupted. Crops were dying en masse, and many people died of starvation.

Locatie
Photographed in: Laki, Iceland
Date: 2004

Photo data
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0013

 
Geology
Volcanism
Added: 18-1-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Volcanism

Comments:
A cracked lava field near Reykjahlid in northern Iceland. These forms occur because the lava field does not cool evenly after the lava has stopped flowing.

Locatie
Photographed in: Myvatn, Iceland
Date: 2004

Photo data
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0014

 
Geology
Volcanism
Added: 18-1-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Volcanism

Comments:
Lava Field with ridges, on the way from Askja to Laugafell via the F910 roed in the north of Iceland. The lava cools the fastest on the surface, leaving a thin crust that ripples due to the the flow of lava underneath.

Locatie
Photographed in: Askja, Iceland
Date: 2004

Photo data
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0015

 
Geology
Sedimentary structures
Added: 18-1-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Sedimentary structures

Comments:
Cross-bedding at Kerlingarfjöll in the middle of Iceland. These structures are probably caused by a sudden flood of water from under the ice sheet in the neighborhood. This so-called Jökullhaup happens when ice has melted under the ice sheet as a result of volcanic activity. When the water makes its way to the outside of the ice sheet, a huge tidal wave will occur. The rock is about 20 meters high.

Locatie
Photographed in: Kerlingarfjöll, Iceland
Date: 2004

Photo data
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0016

 
Geology
Landscape
Added: 18-1-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Landscape

Comments:
Fjallsárlón in southern Iceland. Ice sheets like this shaped the landscape is a large area in the northern hemisphere. In the Saalian glaciation the ice came even come The Netherlands and Germany in Europe, and covered a large part of North America.

Locatie
Photographed in: Fjallsárlón, Iceland
Date: 2004

Photo data
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0017

 
Geology
Folds
Added: 18-1-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Folds

Comments:
An anticline (A-shaped fold) in Durbuy in the Belgian Ardennes.

Locatie
Photographed in: Durbuy, Belgium
Date: 2006

Photo data
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0018

 
Geology
Layering
Added: 18-1-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Layering

Comments:
The stratification (limestone from the Jurassic period) in the picture shows a clear cyclicity. This regularly thinning and thickening of the layers may be caused by periodic changes in the position of the Earth's axis, such as, for example, the Milankovich cycles. The harder limestone represent a period of shallower sea level than the softer marly layers that reflect a deeper depositional environment.

Locatie
Photographed in: Provence, France
Date: 2006

Photo data
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0019

 
Geology
Folds
Added: 25-2-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Folds

Comments:
Near Hanklit on the island of Mors in northern Denmark Moler layers are exposed. In the various ice ages, these relatively soft layers were folded by the pressure of the ice sheet. In these sediments also thrusting occured (not pictured).

Locatie
Photographed in: Hanklit, Mors, Denmark
Date: 2007

Photo data
By Gunther Everaert (Gunther)
Fossiel.net number: 96-0001

 
Geology
Volcanism
Added: 3-3-2008
Last modified: 11-2-2014 by webmaster
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Geology
Category: Volcanism

Comments:
The Massif Central in central France is known for its volcanic activity. When lava flows cool slowly, they can crystallize. In Bort-les-Orgues (Limousin) pillars of meters long Phonolite occurs. Phonolite is (between mafic and felsic) volcanic rock containing predominantly potassium Feldspar, and more than10% Nepheline. This rock occurs in areas with alkali-rich volcanism. Because of its location in a river valley, these formations have not been lost through erosion.

Locatie
Photographed in: Bort-les-Orgues, France
Date: 2007

Photo data
By Erik Sanderson (zoekozoeko)
Fossiel.net number: 739-0001

 
Page 2 of 7

The goal of this Geology Photo page is to present an overview of geological structures from all over the world. Anybody who wants to contribute by improving the information or adding images is welcome to do so! Either contact the Fossiel.net Team or use the Input Form.
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