Showing posts with label upper mantle. Show all posts
Showing posts with label upper mantle. Show all posts

5/15/2012

The Puigcercós landslide (Pyrenees, upper mantle)

In less than 600 characters
This sliding movement is too recent (January in 1881) and hit the old town of Puigcercós (Tremp, Lleida), now abandoned. It is an excellent example of moving mass-transfer complex with rotation and flow. Worth noting its dimensions, and the excellent level of preservation of the typical forms (scar coronation to 200 m, rotating platform and frontal lobe). It is a magnificent example to illustrate how the concepts of hazard, vulnerability and geological risk.
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3/19/2012

Dinosaur traces from Fumanya South (Pyrenees, Lower mantle)

The outcrop of dinosaur traces from Fumanya South is located in an opencast coal mine. Actually are two sites adjacent with a surface 14,000 m2.  On the roof of a marly limestones  Maastrichtian strata, tilted about  60 degrees, there are plenty dinosaur footprints (2200!) and tracks of about 30 titanosaurs.
This is the second most important site in the world of sauropods footprints. Also, this is the second most important site in the world of the Cretaceous; and the third most important site in the world in relation to surface traces, after Lark Quarry (Australia) and Chaoyang (China).

 

3/14/2012

Oliana anticline (Pyrenees, upper mantle)


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In less than 600 characters
The anticline of Oliana is a structure clearly identifiable and is a very representative example of the eastern boundary of the south Pyrenean area, and his systems thrusts and folds, and relationships that took place between the tectonic, sedimentary and geomorphological processes.
In the northern flank of the anticline is a preserved collection of syntectonical sediments related to a series of thrusts that can define the sequence of this strain. The age of the sediments includes the Upper Eocene to Lower Oligocene.
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Geological map from IGC
Vertical-axis rotation of the Oliana anticline
Vertical-axis rotation of a foreland fold and implications for orogenic curvature: an example from the Southern Pyrenees, Spain
Evolución de los sistemas de rampas oblicuas de los Pirineos meridionales: fallas del Segre y Pamplona
Aportaciones al conocimiento del Eoceno del anticlinal de Oliana (prov. Lérida)