Featured Research

from universities, journals, and other organizations

Orogenic Wedge Advance In Northern Andes: Evidence From Oligocene-Miocene Sedimentary Record Of Medina Basin, Eastern Cordillera, Colombia

Date:
April 29, 2009
Source:
The Geological Society of America
Summary:
The interplay between tectonic deformation, uplift and erosive processes creates the topography of mountain ranges, which, in turn, influences atmospheric circulation patterns and the distribution of precipitation. As a result, the erosional products will be carried into the lowlands straddling the flanks of mountain ranges.

The interplay between tectonic deformation, uplift and erosive processes creates the topography of mountain ranges, which, in turn, influences atmospheric circulation patterns and the distribution of precipitation. As a result, the erosional products will be carried into the lowlands straddling the flanks of mountain ranges.

Related Articles


However, often it is not known when, and at what rates these processes have taken place. In the adjacent lowlands of the Andes thick sediment accumulations occur that are of economic value, because they often contain important hydrocarbon-bearing rocks. In the study by Parra et al., the formation of topography of the Eastern Cordillera of the Colombian Andes has been revealed through a multidisciplinary study combining an estimate regarding the time when the present-day range began to be eroded in response to tectonic deformation and uplift. Sediments produced by the combination of uplift and erosion were subsequently deposited in the adjacent foreland basin system to the east.

Thermochronological techniques that measure the temperature and time-dependent generation of fission tracks in zircon minerals reveal that the onset of erosion associated with initial uplift of the range began approximately 25 million years ago. The detailed study of sedimentary characteristics in the adjacent Medina Basin, about 30 km to the east, show deposition in a developing foreland basin with a source area in the present-day Eastern Cordillera.

The locus of subsidence and sediment accumulation in the basin and coeval erosion of the ranges constrains the position of the early Miocene deformation front of the Colombian Andes, helping to better assess the spatiotemporal tectonic and sedimentary evolution of this poorly known sector of the Andean mountain belt.

This research was published by Mauricio Parra et al. (Institut fur Geowissenschaften, Universitat Potsdam, D-14476 Potsdam, Germany) in the May-June issue of GSA Bulletin (pages 780-800).


Story Source:

The above story is based on materials provided by The Geological Society of America. Note: Materials may be edited for content and length.


Cite This Page:

The Geological Society of America. "Orogenic Wedge Advance In Northern Andes: Evidence From Oligocene-Miocene Sedimentary Record Of Medina Basin, Eastern Cordillera, Colombia." ScienceDaily. ScienceDaily, 29 April 2009. <www.sciencedaily.com/releases/2009/04/090429122329.htm>.
The Geological Society of America. (2009, April 29). Orogenic Wedge Advance In Northern Andes: Evidence From Oligocene-Miocene Sedimentary Record Of Medina Basin, Eastern Cordillera, Colombia. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2009/04/090429122329.htm
The Geological Society of America. "Orogenic Wedge Advance In Northern Andes: Evidence From Oligocene-Miocene Sedimentary Record Of Medina Basin, Eastern Cordillera, Colombia." ScienceDaily. www.sciencedaily.com/releases/2009/04/090429122329.htm (accessed October 30, 2014).

Share This



More Earth & Climate News

Thursday, October 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How A Chorus Led Scientists To A New Frog Species

How A Chorus Led Scientists To A New Frog Species

Newsy (Oct. 30, 2014) A frog noticed by a conservationist on New York's Staten Island has been confirmed as a new species after extensive study and genetic testing. Video provided by Newsy
Powered by NewsLook.com
Raw: Hawaii Lava Approaching Village Road

Raw: Hawaii Lava Approaching Village Road

AP (Oct. 30, 2014) The lava flow on the Big Island of Hawaii was 225 yards from Pahoa Village Road on Wednesday night. The lava is slowing down but still approaching the village. (Oct. 30) Video provided by AP
Powered by NewsLook.com
Endangered Carpathian Ponies Are Making a Comeback in Poland

Endangered Carpathian Ponies Are Making a Comeback in Poland

AFP (Oct. 29, 2014) At the foot of the rugged Carpathian mountains near the Polish-Ukrainian border, ranchers and scientists are trying to protect the Carpathian pony, known as the Hucul in Polish. Duration: 02:17 Video provided by AFP
Powered by NewsLook.com
Deadly Mudslide in Sri Lanka Buries Houses

Deadly Mudslide in Sri Lanka Buries Houses

AP (Oct. 29, 2014) A mudslide triggered by monsoon rains buried scores of workers' houses at a tea plantation in central Sri Lanka on Wednesday, killing at least 10 people and leaving more than 250 missing, an official said. (Oct. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins