By: B. J. Deming
Volcanic rocks are useful in many ways, but it can be difficult to tell them apart. Pumice, for instance, is that light-colored rock that’s full of holes and floats on water. Scoria, the geologist’s name for cinder rock, is dark-colored, also full of...
By: Angel Writer - 635550
Tourmaline is a unique beautiful semi-precious mineral made out of a variety of elements which include aluminum, iron, magnesium, sodium, potassium and lithium. This multi-colored mineral has various uses. It also comes in a wide spectrum or colors including black, blue, blue-green, green-yellow, brownish yellow...
Types of geologists
By: B. J. Deming
Modern geology has come a long way since James Hutton published his theory of the Earth in the late 18th century. Today, geologists serve the public in many ways. A closer look at something as simple as the local convenience store can show just how...
By: Keith Redfern
A pyroclastic flow is a movement of material from an erupting volcano. Volcanoes come in many types, relating in part to the acidity of the lava, the level of ash produced and whether they erupt gradually or violently. The word pyroclastic has its origin in...
By: Keith Redfern
A pyroclastic flow is so dangerous because it moves so quickly it does not give anyone the opportunity to escape its potential effects. Furthermore it can move uphill as it is driven both by the power of the eruption and by the gravity force of...
By: Stacie Bradshaw
Mount Vesuvius, on the Bay of Naples, Italy, brings to mind the cities of Pompeii and Herculaneum buried in ash, their inhabitants frozen in time and place as they tried to escape one of nature’s most powerful and destructive forces. Volcanoes such as this...
Examples of historic pyroclastic flows
By: Nigel Holmes
A volcanic eruption is one of the most awe-inspiring sights of nature. Molten rock, or magma, flows down the volcano’s slopes while boulders are hurled miles into the sky. Yet the most destructive, most lethal part of an eruption is the pyroclastic flow. From...
By: Victor Mikulin
Volcanic eruptions of any magnitude are an amazing spectacle and truly one of the more impressive displays of raw power occurring within nature. Throughout history, some of the worst disasters ever recorded came as the end result of volcanic eruptions. While the eruption itself is...
By: Lillian Henry
Basalt is an ignaceous rock that is formed after flowing lava has cooled quickly. It is this cooling process that gives basalt a fine grain appearance. This greyish-black rock is found on Earth, the Moon, Mars, Venus, and the asteroid Vesta. "Although basalt is much...
By: Julie Thomas-Zucker
The world has many examples of historic pyroclastic flows. The oldest known flow is Mt. Vesuvius, Pompeii in Italy. Donna O'Meara in Volcano shows examples of each of these many volcanoes that have erupted over time. Four recent flows occurred in Montserrat in the Caribbean...

 

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