Geology around town - Collins St, Melbourne

Bubble trails in basalt on the ATO building on Collins Street, Melbourne. I like the sections in the upper left where there are sections with differently sized bubbles. I'd suggest these were busy cooling before being pried away from the rest of the block by locally increased degassing.

Fossil leaves - Illawarra coal measure, New South Wales

Both of these images are leaf fossils from the Illawarra coal measures in New South Wales. They have been dated to the Permian! They were provided by Dr C. Mays as teaching samples for a class I assisted teaching at Monash University and I couldn't resist snapping a few photos. They're lovely examples of preservation.

Places I've been: Lake Parumbeet, Victoria, Australia

 The old parumbeet quarry.

 

X-beds found in ash deposits created by pyroclastic flows.

 

Partial view from the crater rim. The lake is the biggest maar crater that's currently filled with water. Jackson van der Hove (Monash University) is currently working on a number of geophysics surveys to determine how many vents are in this maar.