Category: Geology

Tudor Period Mining and Metal Smelting

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During the Tudor period, lead was utilized to build roofs and windows because it was easily mailable and resistive to corrosion. Farmers would mine for lead during the summer months when their crops did not need tending to in order to generate additional income. Mining during the summer months could earn an extra £5.00 which equates to £25,000 as of 2012 when accounting for inflation. Entire families often worked within the mines because 50 barrels worth of ore and soil would be extracted per day to meet the quota of what was required to be profitable. Smelting involved the use of white coal which is effectively dried wood from a kiln and was always setup upon windy hilltops or mountains because the wind would cause the fire blaze with more intensity therefore reaching higher overall temperatures. The best wood to make white coal is oak. Kilns must be airtight, so gaps were filled with clay. Knowing a kiln to be airtight was easily verifiable by searching for smoke as if smoke only came out of only the front entrance, the kiln was considered airtight. Ore was smashed into small pieces to help it smelt more rapidly which yielded approximately an 80% return upon investment. Metals were then refined using a secondary kiln, and smelted to remove any ash or impurities. The first burn removes ore from the rock, and the second burn removes impurities with the main impurity being sulphur. Molds were constructed using sand and wood to create divots which allowed the ore to be molded into blocks much the same as a modern day bar of gold. The sand gives the mold an indentation which archeologists use to identify Medieval bars of smelted ore

Civilizations Mastery of Metal By Manipulating Fire

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The more carbon rich a fuel is, the more heat it produces. Typical wood fires burn at 700 degrees Celsius, however 6000 years ago, ancient people discovered the adaptation of burning wood in a low oxygen environment, only partially burning, but in doing so creating a much purer carbon rich fuel; charcoal. Charcoal can burn at temperatures upwards of 1100 degrees Celsius, hot enough to melt ore out of rock. The mastering of metal produced tools, finance, and weaponry, forever changing the evolutionary story of human beings. By the Middle Ages, the production of charcoal for metal smelting and metal work was a major industry

 

The Discovery of the Route Which Allowed Explorers to First Climb Mount Everest

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British born George Mallory, the person tasked with heading the team who first set out to climb Mount Everest in 1921, overlooked what is now used as the doorway to Mount Everest, the entry point of East Rongbuk Glacier. When Mallory first viewed this entry point, a narrow cliff within the mountainside wall, he dismissed it as too modest and small to warrant further investigation. Canadian Oliver Wheeler however was educated in the science of topography and geography from his father who surveyed the Canadian west coast Rocky Mountains and because of this, he did not view the dimensions of the cut to be as important as the pulse of water pouring out of that cut every afternoon. This enormous volume of expelled water signaled to Wheeler that a glacier had to be present at the head of the valley as it was the only possible explanation which fit. On July 30, 1921, Wheeler set out for the East Rongbuk Glacier and as he anticipated, he was able to make it up the ice field within 6 short days. As the East Rongbuk Glacier widened and curved around, it came directly to the base of the North Col, a sharp edged pass carved by glaciers in the ridge connecting Mount Everest and Changtse (pronounced “chang-see”). This opening became the key to unlocking Mount Everest and is still leveraged by climbers into the modern day. 6 days after setting out, on August 4, 1921, Wheeler sent a dak runner, which is essentially a Tibetan messenger, with a sketched map indicating his discovered exploit of the armor of Mount Everest for Mallory

Technology Provided by the Iron Age

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Iron was favored over bronze throughout history because it could be formed into thin and detailed structures which could not be achieved when casting bronze. This is important because it meant that iron blades could be worked and therefore sharpened to a much more refined degree than bronze which was brittle. Iron is also more readily found, a metal which could be found locally around the world and did not depend upon an immense, trading network. By 400 B.C., iron tools and iron objects became ubiquitous throughout various civilizations with the effects of this new technology felt upon the cutting edge of agricultural technology. Iron is more practical than bronze as bronze needs to be melted down and recast if broken in opposition to iron which could be taken to a fire, hit with a hard object, and repaired to the point at which it becomes functional once again. These aspects helped iron to gain favor worldwide as the metal of choice for building and advancing society. As the Iron Age progressed, knowledge about where iron deposits are found became better understood with more and more iron becoming available upon the open market. This is important because the more readily available a particular type of artifact is, the younger the item typically presents as. As time progressed, iron became akin to plastic of the modern day, being cost effective and readily available to manufacture virtually anywhere. Iron tipped wooden plows allowed for more difficult soils to be farmed, which meant that more land could be cultivated making iron truly an agricultural and commercial revolution in the ancient world. Despite lasting for a period of 1000 years, the Bronze Age was quickly replaced with the more effective and efficient Iron Age. The issue of total replacement is complicated as bronze was not only used for tool making, it also helped to create an elite class and was used for spiritual and ceremonial objects as well as visual displays of prestige and wealth. Iron tools several hundred years later, failed to achieve the same intrinsic value within society that bronze once had as it was less rare and precious and therefore less valuable. Iron tools however were highly practical unlike their bronze counterparts, a feature which plagued agriculture and society as a whole

The Rationale Behind the President’s Chosen to be Depicted at Mount Rushmore

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Mount Rushmore used a combination of dynamiting and jackhammering. It was the largest sculpture of its time. From left to right, George Washington was chosen as the father of the U.S., Thomas Jefferson as the father of U.S. law, Abraham Lincoln as the father of equality for all U.S. citizens, and Theodore Roosevelt who made the U.S. a world power

The Traditional Sherpa’s of Mount Everest

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The term “sherpa” is derived from the terms “shyar” (pronounced “shur”) which means “east” and “pa” which means “people” in Nepali. Migrants who populated the region around Mount Everest throughout antiquity came from the Tiber in the east, crossing the Nangpa La, which means “Elder’s Pass” in Nepali, to settle into Solukhumbu (pronounced “solo-koom-boo”), a region in which the minimum altitude is 4000 meters above sea level. Living a nomadic lifestyle is what made the sherpas expertise so desirable to British mountaineers who arrived a few centuries later. British mountain climbers realized the immense value that these expert travelers possessed which is how the relationship of domestic sherpas and foreign alpinists began. Sherpas were and continue to serve as porters and guides for foreign climbers and during the modern day, a sherpa trekking Mount Everest can expect to earn $6000.00 upon an expedition which intends to reach the summit

The Tallest Mountain On Earth

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Mauna Kea (pronounced “mah-nah kay-ah”) is the tallest mountain in the world, 1.6 kilometers taller than Mount Everest. The main difference between Mauna Kea and Mount Everest is that Mauna Kea ascends from the ocean, instead of from land as Mount Everest does. Mauna Kea is not only the largest mountain on Earth, it is also the largest land mass in the world

The Oldest Artwork in Human History

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Near the Ardeche River (pronounced “arr-desh”) in southern France, less than 0.5 kilometers away, 3 explorers set out a few days before Christmas in 1994. While seeking drafts of air emanating from the ground which would point to the presence of caves, these explorers found a subtle airflow which was blockaded by rocks. The explorers found a narrow shaft which was cut into the cliffside, so narrow in fact that their bodies could just barely squeeze through it. Deep inside the cave the explorers stumbled upon the oldest known cave paintings in human history, twice as old as any other artistic depiction made by human hands. The cave itself had been perfectly sealed for tens of thousands of years which is why this 32,000 year old artwork was found in pristine condition. In honor of the lead discover Jean-Marie Chauvet (pronounced “zhan mah-ree sho-vee”), the cave was named “Chauvet Cave”. The French Ministry of Culture controls all access to the cave, an intervention which was rapidly implemented as this discovery was immediately understood as an enormous scientific find, perhaps one of the greatest anthropological and artistic discoveries ever made. Scientists and art historians are typically the only members of the public permitted access to Chauvet Cave, with archeologists, paleontologists, and geologists being the most common interdisciplinary teams provided entry

The Discovery of the Sunken S.S. Titanic

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The S.S. Titanic’s shipwreck site was found by the U.S. Navy whilst embarking upon a clandestine military submarine sea voyage operation in 1982. The intent of the mission was to surpass the Russians on every front, including land, sea, air, and space. Geologist and Navy Captain Robert Ballard was the person who developed the mission idea by suggesting that the U.S. Navy scour the seafloor to gather intelligence and search for evidence of Soviet placed hardware. The original intention of the mission was to locate and recover 2 U.S. Navy submarines which were classified as top secret nuclear attack vessels and lost during the 1960’s. The first submarine was the U.S.S. Scorpion, lost in 1968 with 99 onboard, and the second was the U.S.S. Thresher, lost in 1963 with 129 onboard. Recovery of these vessels during the 1960’s was limited to the Sound Navigation and Ranging technology of the era, commonly abbreviated as “SONAR”. Ballard only had 12 days to locate the S.S. Titanic during the mission without exposing his cover story, a feat which was unable to be completed by the French and the Americans, despite having much longer time spans and multiple expeditions to achieve this goal. Ballard narrowed down the search area to 80 square kilometers and focused towards the south as he believed that ocean currents would have carried sunken debris in that direction. Ballard continued searching for a trail of scattered debris from the S.S. Titanic and on the 9th day of the expedition, with time quickly running out, the operators of the remotely operated vehicle ARGO, found wreckage from a modern iron ship which appeared to be from the early 20th century. It was confirmed shortly after on September 1, 1985 at 12:48 AM that these remains were 1 of the 29 boilers belonging to the S.S. Titanic. It had been 73 years since the S.S. Titanic was last seen, resting nearly 4 kilometers below sea level, with it’s 1500 onboard passengers and crew

European Neolithic Mining Practices

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During the Neolithic period, flint was as prized as gold was to the Hindus, Christians, and Buddhists. 4500 years ago, flint miners dug shafts up to 12 meters deep in search of more flint. Ladders and wooden platforms made extracting the ore easier. This task was Herculean as the only picks available were reindeer antler. When a mine was exhausted, a new hole would be dug and the rubble from that hole would be used to back fill the previous mine. Most flint can be found above ground and most of the flint found at Neolithic sites is indeed surface flint so it is unclear why such a massive undertaking was performed as much more readily available sources were freely available. Flint is black in color with a shiny, glass like appearance similar to obsidian. Flint chips easily and is fairly simple to make incredibly sharp by simply cracking off a piece with a harder rock. It’s possible that mine shafts were dug as a ceremonial coming of age tradition in that a prepubescent adolescent would enter into the mine, dig into the depths of the Earth, and then emerge back out as an adult. This theory is backed up by the fact that the majority of miners left their picks in the mine, possibly signifying that they had reached adulthood. It is unclear if these picks were left because they were considered to be spiritually polluted or if they offered their pick as an offering to the Earth itself in exchange for what has been brought to the surface. There is a site in Britain at which over 400 of these mines were dug a few meters from eachother giving the landscape a cratered appearance