English: Photograph showing the 'golden spike' (bronze disk in the lower section of the image) of the Global Boundary Stratotype Section and Point (GSSP) for the Ediacaran period, located in the Flinders Ranges in South Australia. Able to be read when you click through to the full image. The core holes were made to study changes in the earth's magnetic field. (Source - sign at location).
|Author||Peter Neaum ( talk)|