|Alter:||590 Millionen Jahre|
Aeromagnetic image of the Acraman area of the Gawler Craton, covering the Landsat scene (see image below). ER Mapper file: total magnetic intensity, pseudocolor (Gaussian equalisation histogram stretch), sun angle from the northeast.
Landsat scene covering most of the Acraman impact structure in the Mesoproterozoic Gawler Range Volcanics, showing: 1, Lake Acraman within the Acraman depression; 2, Lake Gairdner; 3, Lake Everard; 4, the Yardea corridor at 85-90 km diameter. Surface water (darker blue) in Lake Gairdner helps define an arcuate trend (5) at ~150 km diameter that continues westward to Lake Everard. X marks the location of a central dipolar magnetic anomaly in the southeastern part of Lake Acraman. Landsat scene 15 February 1973, scene center S31-30 E135-51. Please note that the scale in the image is incorrect: a journal error. The diameter of Lake Acraman is approximatly 30 km.