Just as any other morning, Siberia was quiet and peaceful where everybody was just enjoying themselves, living their life when something catastrophic struck many peoples’ lives. Tunguska, Siberia has many mysteries, but this one mystery has had Russia very concerned. Until this very day, they’re trying to find the key evidence of a tragic event that was taking place on the banks of the river Podkamennaya Tunguska, Siberia. This event has struck many lives and not one single soul has found the cause or reason to why or what happened there. Though, many remarkable stories were told, nobody has ever found the truth or accurate evidence. Many Russian scientists can’t even pin point out the signs to the cause of it but remarkably having many theories. Today, Tunguska still remains a notorious mystery as scientists still search the area for more interesting clues, if any, which may change the Russians forever. On the morning of June 30, 1908, roughly 7:17 am, a catastrophic and mysterious occurrence has taken place by the Tunguska River, but that is about all this is known about it. This event was an explosion; an explosion that still remains unknown on how or what happened, who caused it, and why. In the article “The Tunguska explosion: an unexpected loud bang and explosion” by Philip Coppens, the explosion was so significant in history that this event is known for being the largest impact in history. Over 80 million trees had fallen over an area of 2,150 square kilometers. Also, in Coppens’ article, several people in the villages nearby had suffered from fatal burns and later reported that two people were killed. William K. Hartmann, who wrote the article “1908 Siberia Explosion: Reconstructing an Asteroid Impact from Eyewitness Accou...
Simkin,T., Unger, J., Tilling, R., Vogt, P. and Spall, H. (1994) This dynamic planet : world map of volcanoes, earthquakes, impact craters, and plate tectonics. U.S. Geological Survey, Map Distribution
However, gravity also causes things like asteroids to form. Asteroids are small, rocky objects that orbit the sun and are primarily located in the asteroid belt between the orbits of Mars and Jupiter ["How Asteroids Work."]. It is widely speculated that asteroids are remnants from the massive cloud of dust and gas that condensed to create the solar system around 4.5 billion years ago. They can range from a few feet to several miles, wide [“Asteroids and Comets.”]. An asteroid impact can be immensely devastating [See Fig 2.]. A prime example is the one that is thought to strike the Earth 65 million years ago. It is widely speculated that this asteroid caused so much moisture and dust to go in the atmosphere that it blocked sunlight, plummeting temperatures worldwide and causing the extinction of the dinosaurs [Brian, Marshall.]. With over 20,000 asteroids known to man, the pressing question is, how can we avoid ...
Comets and asteroids. They are some of the first celestial bodies that humans observed and truly thought about. From ancient cultures interpreting these near-Earth objects as signs of disaster, to 18th century Europeans studying their paths, to even the extinction of the dinosaurs, comets and asteroids have always been prevalent in the majority of Earth’s history. These objects have intrigued the human race for generations, and continue to do so today. These similar subjects of fascination have many unique and interesting characteristics and a rich history with Earth.
The first written records of comets date back to nearly 3,000 years ago from China and Europe. The accounts of these comets were believed to be the causes of terrible events that occurred afterwards. In more recent times, however, astronomers have found out what they really are. A comet is basically a mixture of ices, from both water and frozen gases, and dust.
In the article “Meteor Crater,’ it referred to just as “Meteor Hole” to most people. Researchers allude to it as "Barringer Hole" according to Daniel Barringer, the man who said that the hole made by a flying rock. In 1903, with his accomplice, they conducted studies and collected documentation supporting his meteor hypothesis. The researcher didn’t believe them till the 50’s and 60’s. In 1929 a disclosure of the minerals helped to prove the theory of Barringer but it was too late.
One of the areas I could identify during this observation was the Tycho. This was a interesting feature which looks like fireworks. Tycho is smaller than Copernicus and it is also relatively young in lunar terms, 108 years old. A dark ring surrounds Tycho which according to different studies, including one that landed on the crater, indicate the dark material is glassy impact-melted rock, scientist belief that a meteorite fell and during the impact and explosion occurred forming the crater.
These craters were formed differently as the one that gave rise to the Vredefort Dome was formed when the asteroid hit the earth surface and the Pilanesburg was formed after the volcanic eruption. Linda & Elkins-Tanton (2006:84) supports this statement. As these craters were eroded, they gave rise to the Vredefort Dome and the Pilanesberg. Both of these landforms were formed approximately 3000 million years ago (Grab & Knight, 2015:32). Both landforms are recognized as geotourism. Today both landforms remain circular in
Comets have been witnessed ever since man has been speculating about objects in the nighttime sky and appear in records from the beginning of recorded civilization (Schweighauser 20).
Comets are made up of four distinct features. The first is the nucleus. The nucleus is made up of frozen gases, mostly water vapor with lesser amounts of carbon dioxide and carbon monoxide, and imbedded in the frozen gases are interplanetary dust and tiny fragments of stony and metallic meteoric material. Some comets, the larger ones, have a nucleus of 10 kilometers (Schweighauser 22).
Jordan Craters is a wonderful sight mainly because of its well-preserved vents and striking flow features. Near Coffeepot Crater, the flow surfaces are vesicular shelly pahoehoe, which grade to massive tube-fed ropy pahoehoe in the distal regions. A 75-square-kilometer coffeepot Crater is a heart-shaped tephra cone constructed of numerous overlapping lobes of alternating densely to weakly welded scoriaceous lapilli and bombs (Volcanoes of the World). The walls of the crater show good evidence for a fluctuating lava pond, which appears to have broken through and rafted away portions of the northeastern and southeastern crater walls. Backflow of the lava pond into the conduit is indicated by pahoehoe crust on the present crater floor.