Tag Archives: coast

An Introduction to Tsunami

The 11 March 2011 earthquake near Honshu, Japan triggered a tsunami that spread across the Pacific Ocean. The tsunami arrived an hour before I gave the first tsunami lecture for the Natural Catastrophes class. In that context, it seems an … Continue reading

Posted in Geoscience | Tagged , , , , , , , , , , , , , , , , , , , , | 9 Comments

Guest Lecture: Australian Coastal Geomorphology

‘Tis the season to be talky! I’m giving another talk next week — a guest lecture on Australian Coastal geomorphology. I’ll be talking about the processes that create coastal landforms, and showing lots of pretty pictures of examples from the … Continue reading

Posted in Geoscience, Practice of Science | Tagged , , , , , , | Leave a comment

Rangitoto Island, New Zealand

Rangitoto, New Zealand is the youngest and largest volcano in the Auckland Volcanic Field. With a final eruption at least 600 years ago, the volcanic island is slowly weathering into soil. The rate of weathering is increased both by rainfall-watered … Continue reading

More Galleries | Leave a comment

Paleodunes at Barwon Heads

The bluffs of Barwon Heads are aeolian calcarnite — solidified sand dunes. As rain fell on the sand dunes, the top surface is cemented as calcrete. More dunes formed on top, and more, and more, with layers of hardened calcrete … Continue reading

More Galleries | Leave a comment

The Beach of Wonthaggi

Coastlines are landscapes of constant change. Near Wonthaggi, Australia, the shore is stabilized by extensive rock platforms and high rock-cored sand dunes. Small erosion patterns etch into the sand as the ebbing tide drains off the beach, and a river … Continue reading

More Galleries | Leave a comment

Basalt Cobbles & Onion Skin Weathering

At Settlement Point east of Melbourne, extensive basalts and tuffs of the Older Volcanics form the cliffs and shore platforms. The spherical weathering occurs as water penetrates along joints and fractures, decaying the rock layer by layer like onion skin. … Continue reading

Posted in Geoscience | Tagged , , , , , , , | Leave a comment

Squeaky Sand on the Friendly Beach

The white sands of Friendly Beach, Tasmania, Tasmania, squeak under every step. The sand is nearly pure silica, originating in quartz-baring rocks, eroded into sand, compacted into sandstone, and re-eroded into fine, smooth, rounded grains. The black rock shore platforms … Continue reading

More Galleries | 1 Comment

Sand Bubbler Crabs

Scopimera inflata is an artist among crabs, creating beautiful patterns of tiny sand spheres while foraging for food. The crab scuttles from its hole, and begins rolling balls while sucking any algae and other nutritious goodies from the sand. The … Continue reading

More Galleries | Leave a comment

Coastal Geomorphology: details of stops

This is a gallery of photos from the Coastal Geomorphology field trip. The sites are numbered in accordance with the trip map in chronological order (Monday, Tuesday, Wednesday, Thursday, Friday). Clicking each thumbnail will bring up a new page with … Continue reading

More Galleries | Leave a comment

Coastal Geomorphology: An Overview

The VEIPS Coastal Geomorphology course resulted in over a hundred pages of notes (48 handwritten + 61 photos) and over a thousand photographs from the last five days. Geomorphology is the processes by which landforms are created; coastal geomorphology involves … Continue reading

Posted in Geoscience | Tagged , , , , , , | 1 Comment