• Análisis geomorfológico de la costa central sur de Chile en imagenes de Sky lab 3 experimento 190 A
  • Geomorphological analysis of the south-middle coast of Chile in skylab images
José F. Araya Vergara

Resumen

The material fron SKYLAB 190 A was examined in posirive transparences of1 1/4 x 2 1/4 in., which belong to 6 bands. 1: was observed the better bands that are those of 0.6 - 0.7 microns (panchromatic. hlack and white), 0.5 - 0.88 microns (infrared colour) and 0.4 - 0.7 microris (high resoheion colour). The analysls furnishes fout groups of coastal individuals: A Related to the structure, B. Formed by subaerial processes little changed by the sea, C. Formed under action of factors other than waves, andD. Formed by wave ation. As regional individuals were detected two types of associations: A. Connected with the structure and tectonics and B. Connected with the external geodynamics. The regional systematization gibs two tectonic styles between Mataquito River (35°S) and Arauco (37-38° S.): A. Oblique structure in the North, and B. Longitudinal structure in the South.
The dynamic notion obtained from the images teaches: A. that the coast hasevolved with two different tectonic styles, B. that the river; sedimentation hasbeen important for rhe coastal regularization, C. that de marine sedimentation ismore important than the abrasion in these regularization, and D. that there is acombinate action berween the tectonics and the sea on the cliffs origin.
Therefore, the comparative study of the multispectral camera irnaprs is agood method for regional studies. Some better bands may be sdected and complementarily used.The bands colour infrared and conventional, as well as the black and white panchromatic are revealed as being practical in coastal morphology.

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DOI: 10.5354/0719-5370.1977.27356