تاريخ منجمنا Al Masane Al Kobra (AMAK) operates an underground copper, zinc, silver, gold mine in the Najran Province of South West Saudi Arabia. The mine is located 80km North of Najran and 220km East of Abha.AMAK is currently developing a new open pit gold mine called Guyan some 15kms from the existing AMAK mine […]
2021-8-17 · A schematic diagram of a NE (left) to SW (right) cross-section through the 2.020 billion year old Vredefort impact crater in South Africa and how it distorted the contemporary geological structures. The present erosion level is shown. Johannesburg is located where the Witwatersrand Basin (the yellow layer) is exposed at the "present surface" line, just inside the crater rim, on the left.