At www.pasthorizonspr.com/index.php/archives/03/2013/fishtrap-evokes-powerf… … which is a bit of a soft soap kind of reporting, nothing like a bit of environmental emotionalising, but the subject itself is interesting, an Aboriginal fish trap at Esperance in Westrn Australia consisting of a series of aligned stones across part of a tidal estuary. The trap probably included wooden stakes that have decayed and other fibrous material with the aim of forming a barrier stopping some of the fish swimming into the estuary mouth from escaping and there enabling the Aborigines to spear them.
During med Holocene the tidal region was probably quite different – changing sea levels and coastal formation processes have altered the situation. Evidence of occupation of offshore islands brings home that in the Early Holocene a huge coastal plain existed, now submerged. Hence, the fish trap site must have been fairly recent.
At www.pasthorizonspr.com/index.php/archives/03/2013/mattarahkka-mother-ear… …. again this article appears to have been written by a hippy that has swallowed the Earth Goddess theory and interprets rock art through misty eyes. Take a look at it as it has some resemblances to the plasma rock art of Anthony Peratt.