Category Archives: Geology

Rockfall

rockfall

Like most scientists, geologists are classifiers. We break all sorts of features into different groups based on their properties; soils, weather patterns, volcanoes, you name it we can classify it. This image is a particular type of a mass movement … Continue reading

Posted in Geology | Leave a comment

The Australian Opal

opal

On the 1st of February 1915, 14-year-old Willie Hutchinson was searching for water in the Australian Outback. Suddenly the boy came across small white glimmering stones, unlike anything he’d seen before. Willie had just discovered what would become Coober Pedy, … Continue reading

Posted in Geology | 1 Comment

Himalayan ‘drop after Nepal quake’

The height of a swathe of the Himalayas has dropped by around one metre as a result of the devastating Nepal earthquake, scientists say. But they add that the drop will roughly be balanced by slow uplift due to tectonic … Continue reading

Posted in Geology | Leave a comment

Calbuco Volcano In Eruption Southern Chile

Posted in Geology | Leave a comment

William Smith: Seminal geology map re-discovered

williamsmith geology map

 Click to enlarge A first edition copy of one of the most significant maps in the history of science has been re-discovered in time for an important anniversary. William Smith’s 1815 depiction of the geology of England, Wales and part … Continue reading

Posted in Geology, History | Leave a comment

Volcanic lightning storms are creating perfect crystal balls

Image: A glass ball formed during their experiment. Credit: Genareau et al., 2015

Image: A glass ball formed during their experiment. Credit: Genareau et al., 2015 Scientists have discovered tiny, perfectly round spheres of glass in the ash left over from volcanic explosions, and say they could be the key to understanding how … Continue reading

Posted in Geology | Leave a comment

Blood Falls

If you can put up with this guys really annoying presentation, the information imparted is quite interesting. – Deskarati

Posted in Geology | Leave a comment

This Chunk Of Fool’s Gold Naturally Formed In These Cubes

The golden color and shine of iron pyrite (which is responsible for its nickname, “fool’s gold”) may grab all the attention. But, there is another element of its appearance that is every bit as dramatic: It’s tendency to form into … Continue reading

Posted in Geology | Leave a comment

Under Pressure

This is the Idol Rock, a classic balanced stone located in the Nidderdale “Area of Outstanding National Beauty” in Yorkshire, UK. The rock is made of layers of the “Millstone grit”, a set of carboniferous-aged sedimentary rocks found throughout Northern … Continue reading

Posted in Geology, Interesting | Leave a comment

The unique geology of Macquarie Island

macquarie island

Macquarie Island is located in the south-west Pacific Ocean, between Australia and New Zealand, and officially belongs to the Australian state of Tasmania. The island is tiny, only 5 km (3.1 mi) wide and 35 km (21.7 mi) long, covering … Continue reading

Posted in Earth Sciences, Geology | Leave a comment

New, tighter timeline confirms ancient volcanism aligned with dinosaurs’ extinction

A definitive geological timeline shows that a series of massive volcanic explosions 66 million years ago spewed enormous amounts of climate-altering gases into the atmosphere immediately before and during the extinction event that claimed Earth’s non-avian dinosaurs, according to new … Continue reading

Posted in Geology | Leave a comment

The Holocene

Paleogeographic reconstruction of the North Sea approximately 9,000 years ago during the early Holocene and after the end of the last ice age.

Further to my post recently on geological periods, I thought you might be interested in the period we are in now – The Holocene. It turns out that this also breaks down into smaller time scales known as chronozones and … Continue reading

Posted in Geology | Leave a comment

Geological Periods

geological periods 2

A geologic period is one of many sub-divisions of geologic time enabling the cross-referencing of rocks and geologic events from place to place. These periods form elements of a hierarchy of divisions into which geologists have split the earth’s history. Eons and … Continue reading

Posted in Geology | Leave a comment

Verticality

One of the fundamental principles of geology is that sedimentary rocks are deposited in horizontal layers due to gravity. There are some exceptions, including cross beds and rocks deposited on steep slopes, but the rule is a very good guide. … Continue reading

Posted in Earth Sciences, Geology | Leave a comment

The story of pahoehoe

This is really a fascinating photo. Did you ever think that a chain link fence would hold up against lava? Of course, given enough time, the fence isn’t going to hold up, but this photo illustrates some of the most … Continue reading

Posted in Earth Sciences, Geology | Leave a comment

Supervolcano blast would blanket U.S. in ash

A new simulation illustrates the explosiveness of the volcano that lurks beneath Yellowstone National Park in Wyoming. Around 640,000 years ago, the volcano blew its top and coated North America with roughly 1,000 cubic kilometers of ash, enough to fill … Continue reading

Posted in Earth Sciences, Geology | Leave a comment

Where does desert sand come from?

Sand is a great traveller. Go to the seaside for the day and it’ll ride home on your shoes or sneak into your picnic sandwiches. You may wonder, as you shake sand from your bag on the beach: ‘where did all … Continue reading

Posted in Deskarati Q&A, Earth Sciences, Geology | 1 Comment

How The Sahara Desert Was Made

Posted in Geology | 1 Comment

Volcano Eruption in Papua New Guinea

Posted in Earth Sciences, Geology | Leave a comment

Mystery solved: ‘Sailing stones’ of Death Valley seen in action for the first time

moving stones

Racetrack Playa is home to an enduring Death Valley mystery. Littered across the surface of this dry lake, also called a “playa,” are hundreds of rocks — some weighing as much as 320 kilograms (700 pounds) — that seem to … Continue reading

Posted in Earth Sciences, Geology | Leave a comment