Adventure Ausrama Blog

Bracelet is made 40,000 years ago by Denisovan who used a tool like a drill to make holes of the same diameter in the jewelry. It was obviously made by a master craftsman. The bracelet is made of chlorite a silicate mineral usually green in color. Chlorite is the name of a group of common sheet silicate minerals that form during the early stages of metamorphism. Most chlorite minerals are green in color, have a foliated appearance, perfect cleavage, and an oily, soapy feel. They are found in igneous, metamorphic and sedimentary rocks. The body jewelry was found in the Denisovan cave in Siberia - the cave that the premodern hominids were named after. They were close enough genetically to Homo sapiens for inter-breeding to occur producing fertile offspring. The term "human" is now loosely used to include this species and back to Homo erectus. This find puts Denisovans ahead of Homo sapiens technologically. Denisovans were much older than Homo sapiens leaving Africa...

Drilling techniques in industry have not changed for decades. Oil rigs are built in he same old way. Now something has come along that will improve drilling enormously. The Deep Exploration Technologies Cooperative Research Centre based in Adelaide has announced a new type of drill. It is constructed with coiled tubing. Costs will fall dramatically as drilling is faster . Australia's mines are mostly over 30 years old. New mines have to be established. We can only rely on the old mines for another 20 years. No longer is it necessary to keep stopping to add a new drilling section. The new drill is a continuous coil of tubing. Being smaller and lighter transportation is easy. The motor is at the bottom of the shaft, not at the top. The tubing no longer twists during drilling. Any twisting will occur in the other direction as the motor pulls the tubing around. Less drilling power is needed as the tubing is being pulled around in already drilled space. A lot ...