How Australia became an island (https://elowyn.wordpress.com/2010/06/04/kerguelen-islands/) By Albert The oceans were once less known than the Moon. Perhaps this is true no longer. Gravity maps released last year show remarkable details of the ocean floor. Chains of (ex-)volcanoes are everywhere. Spreading ridges and transform faults are visible. Under water plateaus around islands are revealed. A…
Fig1. Last active between 160 – 145 million years ago, the Zuidwalvulkaan is showing signs of unrest. Its location just off the Dutch coast is a cause for grave concern (www.npowetenschap.nl) The Sûdwalvulkaan (Zuidwalvulkaan) has been sitting dormant at 2 km under the Waddenzee (Frisian Sea) in the north of the Netherlands for some 150…
April 2015 will mark the 200 year anniversary of the largest recorded eruption in historic times. Yes, Tambora. Tambora’s sulphate dust clouds are now attributed with disrupting major weather systems for more than three years, causing net global cooling, global crop failures in 1816, famine and disease, including a cholera pandemic. Yet, despite being one…
From Wikipedia: “A lineament is a linear feature in a landscape which is an expression of an underlying geological structure such as a fault. Typically a lineament will comprise a fault-aligned valley, a series of fault or fold-aligned hills, a straight coastline or indeed a combination of these features. Fracture zones, shear zones and igneous…
Chikurachki erupted explosively on February 16, 2015. The plume reached 7.5 km (25,000 ft) on 16 February, itself, and 3.6 km to 4.5 km on February 17 and 18. The Earth Observatory, NASA, published this image of the eruption plume: Fig 1: Plume on February 17, 2015. Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=85321 Chikurachki is a 1,816 m high…
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