105 D9. Recent Advances in Geomorphology (Posters)

Monday, 23 September 2019
9:00 AM - 6:30 PM
Hall AB, North Building

CONTINUING PRESENTATION OF GEOMORPHOLOGICAL ASPECTS OF THE MIDDLE MAGDALENA RIVER VALLEY IN COLOMBIA: FAR FROM THE RETORIC CLOSER TO REALITY

Paper number: 105-12
Program: Technical Sessions
Time: 9:00 AM – 6:30 PM

Authors

Abstract

in this delivery, maps of geophorms found during the Integrated Study of the Middle Magdalena Valley of the Magdalena River, sector between municipalities Piedras, Venadillo-Tolima and Girardot-Cundinamarca-South part, up to La Dorada-Caldas and Puerto Salgar-Cundinamarca- North part. Several geophorms, such as stable Quaternary Geoforms and active sediments. In addition, Tertiary rock Geoforms and Cretaceous rocks Geoforms.

Quaternary Geophorms, such as Fans, Extensive alluvial fans, Sand bars, Cones, Coluvions, Alluvial plains, Flood plains, Plateaus, Beaches and alluvial terraces. The high and very thick alluvial terraces of the Southern Zone of the Middle Valley of the Magdalena River were presented during the GSA NC Section, Madison, WI, 2015. Active Sediment Geophorms, located in flood zones, bars, beaches and occasionally alluvial plains, all directly related to the east and west banks of the Middle Valley of the Magdalena River throughout the Middle Valley of the Magdalena River.

Tertiary rocks Geophorms: compact to semi-compact sedimentary rocks fine grains to conglomerate particles; usually, folded by tectonic effects (Honda Formation) and also, flat Geoforms with horizontal strata (Mesa Formation) are easy recognizably along the North of the sector.

Cretaceous rocks Geophorms: abrupt slope with escarpments in compact, very fine grain, dark marine sedimentary rocks of the Early Cretaceous Formations and clear strata of the Upper Cretaceous (i.e. Cimarrona Formation). They are geoforms that demonstrate the presence of geological structures (anticlines and synclines) from the municipality of Girardot-Cundinamarca- to the vicinity of Guaduas (Cundinamarca) and Honda (Tolima.) Drains with structural control occasionally cutting the synclinal structures along transverse faults.

Geological Society of America Abstracts with Programs. Vol. 51, No. 5

doi: 10.1130/abs/2019AM-339220

© Copyright 2019 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.