What are the traits of a shield volcano?
By: Keith Redfern
The most obvious trait of a shield volcano is its shape, which is gently sloping with an immensely wide base. A shield volcano is one from which mainly lava flows, and its shape relates directly to the acidity of its lava, which is alkaline.Along...
How jade is formed
By: M. L. Kiser
Jade, that beautiful and coveted mineral that presents numerous colors from white and yellow to varied greens, is a stone used in China and Burma for centuries for carving daggers and knives, and in jewelry. Found in many parts of the world from the Americas...
By: CJ Han
According to National Geographic, “Two important traits that characterize volcanoes are explosiveness and viscosity” (“Forces of Nature-Volcanoes”, 1996). Shield volcanoes are not explosive because they have basaltic magma with low viscosity. They also have low slopes connected to a central vent that form...
By: M E Skeel
When a volcanic eruption is imminent, the volcano will often eject tonnes of volcanic ash into the atmosphere. This material is produced by the explosive conditions in the volcano and is not a product of combustion, so the term ash is not accurate. Instead the...
By: Kenneth Andrews
Pollutants in groundwater have become more of a point of public concern in recent years, and that concern is growing all the time. Polluted groundwater affects fish and local wildlife populations, and also has the potential to filter through into the human diet via freshwater...
By: Blaise Pascal
Granite is a very common type of rock that has been, and is still used for a variety of purposes. Its strength makes it an excellent building material used in the past and in the present, and it isn’t very porous or affected by...
How opals are formed
By: Tamatha Campbell
Opals are beautiful stones used for jewelry and small sculptures. Many of them are white or clear, but some of them have a gorgeous array of colors. Chemically, opal is similar to glass, quartz, and those little silica gel packets that are meant to keep...
An introduction to common precious stones
By: B. J. Deming
The world of gemstones is beautiful and varied. While every jewel is highly valued by someone, we instinctively recognize the classic precious stones. Amber is beautiful, and yet it’s obvious that no one would make a Diamond Room or Ruby Room as they once...
By: Blaise Pascal
During an eruption, lava leaving a source (volcano, vent, or crater) travels across the surface and either reaches the ocean or eventually stops. The hardened surface produced after the lava has completely cooled and solidified isn't necessarily that interesting. It can have an interesting look...
The importance of plant life in the ocean
By: Anastasia Varnava
Sea water covers almost 70% of the Earth’s surface, which is, no wonder, called the Blue Planet. The vast terrains holding the sea water within them are filled with animal and plant life of crucial importance for the survival of the planet. Ocean plants...

 

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