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.

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 22, 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 22, 2014).

Share This



More Earth & Climate News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

Reuters - Light News Video Online (Oct. 22, 2014) — The pair of rare white northern rhinos bring hope for their species as only six remain in the world. Elly Park reports. Video provided by Reuters
Powered by NewsLook.com
Trick-or-Treating Banned Because of Polar Bears

Trick-or-Treating Banned Because of Polar Bears

Buzz60 (Oct. 21, 2014) — Mother Nature is pulling a trick on the kids of Arviat, Canada. As Mara Montalbano (@maramontalbano) tells us, the effects of global warming caused the town to ban trick-or-treating this Halloween. Video provided by Buzz60
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) — He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

Newsy (Oct. 20, 2014) — The United Nations says water is a human right, but should it be free? Detroit has cut off water to residents who can't pay, and the U.N. isn't happy. Video provided by Newsy
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