Abstract

From southern New South Wales a palaeomagnetic survey of rocks whose ages are Upper Silurian — Lower Devonian, Middle Devonian and Upper Devonian has been made. The rock types include the Canberra Volcanics and Porphyries, the Murrumbidgee Sandstones and the Nethercote Basalts. Throughout these formations and irrespective of the rock type the directions of magnetization are remarkably uniform. The low inclination of the direction of remanent magnetization indicate that throughout this period Australia lay 10–15° away from the equator, the pole lying in the South Atlantic. Evidence for stability of the rocks is as follows: (1) their uniformity of direction, (2) the deviation from the present geomagnetic and dipole fields, (3) the presence of normal and reversely magnetized rocks. These data lend support to the belief that south-eastern Australia experienced tropical conditions during the Devonian.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.