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Los valles subterráneos y la geoarqueología del Sáhara Oriental revelados por el radar del transbordador espacial
Science (New York, N.Y.)
|December 3, 1982
Resumen
El Shuttle Imaging Radar-A (SIR-A) reveló antiguos valles de ríos enterrados y estructuras geológicas debajo del Sáhara.
Área de la Ciencia:
- Geología Geología Geología.
- Arqueología Arqueología.
- La detección remota con sensores.
Sus antecedentes:
- La capa de arena de Selima del este del Sahara cubre extensos paisajes antiguos.
- Comprender la geología del subsuelo es crucial para interpretar la historia regional.
Objetivo del estudio:
- Para investigar las características geológicas enterradas y los posibles sitios de la Edad de Piedra en el Sahara utilizando imágenes de radar.
- Evaluar las capacidades del Shuttle Imaging Radar-A (SIR-A) para la exploración subterránea en entornos hiperáridos.
Principales métodos:
- Utilized Shuttle Imaging Radar-A (SIR-A) datos adquiridos en noviembre de 1981.
- Analizó las respuestas de radar del lecho rocoso y las superficies de grava bajo la cubierta de arena.
- Los hallazgos de radar correlacionados con la evidencia geológica y arqueológica.
Principales resultados:
- SIR-A penetró en la arena seca, revelando valles enterrados, estructuras geológicas y posibles sitios de la Edad de Piedra.
- Identificó antiguos sistemas fluviales, algunos tan anchos como el valle del Nilo, que posiblemente datan del Terciario medio.
- Se detectaron wadis cuaternarios y artefactos asociados de la Edad de Piedra, lo que indica la ocupación humana pasada cerca de estas características.
Conclusiones:
- SIR-A cartografió eficazmente las redes de drenaje subterráneo, explicando la ubicación de los oasis y playas modernos.
- La profundidad de penetración del radar en la arena seca puede superar los 5 metros, validando la utilidad de SIR-A para explorar regiones hiperáridas.
- El estudio destaca el potencial de la teledetección por radar para descubrir registros geológicos y arqueológicos ocultos.
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