Drop Stone

Drop Stone

Boulders, cobbles, pebbles and gravel in layers of otherwise fine sedimentary rocks are all glacial erratics or drop stones picked up in valleys by moving glacial ice to the south. The glacial ice broke up at the coast to form icebergs which carried the load of rocks and rock fragments north. As the ice melted the rocks dropped into the silty seafloor. 

Drop stones include metamorphic rocks such as schist, phyllite, slate, hornfels, meta-chert and quartzite; igneous rocks such as rhyolite, ignimbrite, syenite, dolerite, and granite with occasional sedimentary rocks such as clongomerate and brecia. The drop stones are of Cambrian, Ordivician or Devonian origin, much older than the Permian sediments along the coast.

Page 1 of 1 pages - image sightings only 7 7 7

1 

Species information

• Drop Stone Scientific name
• Drop Stone Common name
• Not Sensitive
• Cosmopolitan
• Non-Invasive
• 5.618m Recorded at altitude

Location information

• Maps

  Murramarang National Park Morton National Park South Pacific Heathland Reserve

• Places

  Ulladulla, NSW

Follow Drop Stone

Receive alerts when new sightings are reported