Featured image: Example of the rock type Pegmatite. Here, crystals of the mineral tourmaline (light-dark green color), and crystals of the mineral lepidolite (pink-purple color) can be seen, sourced from Wikipedia. This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Paper: Episodes of fast crystal growth in pegmatites
Authors: Patrick R. Phelps, Cin-Ty A. Lee, Douglas M. Morton
Anyone who has ever wandered along a pebble-ridden beach or a mountainous trail has likely picked up a rock or two, and maybe these rocks contained an array of different crystals (see image above). Perhaps these rocks then skipped along the surface of a still lake, or made their way into the pockets of a snack-ridden backpack, either to never be seen again or to be added to an ever-growing rock collection. Yet, these little pieces of Earth’s history have the potential to do so much more. With the right tools, the crystals within these rocks can be used to inform us of the geological processes that have shaped our planet Earth.
Continue reading “Cooking up crystals in record time”
Paper: Can nanolites enhance eruption explosivity?
Authors: F. Cáceres, F. B. Wadsworth, B. Scheu, M. Colombier, C. Madonna, C. Cimarelli, K-U. Hess, M. Kaliwoda, B. Ruthensteiner, D. B. Dingwell
Explosive volcanic eruptions have punctuated our planet’s geological record for millions of years. The explosive nature of these eruptions can lead to thousands of cubic kilometers (that’s a billion Olympic swimming pools) of material travelling hundreds of miles across our landscapes and into our atmosphere. Approximately 630,000 years ago, the most recent eruption from the Yellowstone volcanic center sent ash and dust from Wyoming to southern Texas, USA. More recently, the 1815 eruption of Mt. Tambora, Indonesia, led to 1816 being historically known as the “Year Without a Summer”. The “Year without a summer” was started when volcanic materials entered the atmosphere and induced a volcanic winter, which led to extreme weather, agricultural stresses, and food shortages across the globe.
Continue reading “Tiny but Mighty! Nanosized Drivers of Explosive Volcanism”