The Franciscan Complex
Introduction
The Franciscan Terrane of central California represents an accretionary complex formed by long-term subduction of an oceanic plate under the Western margin of the North American craton. The Franciscan complex is composed of three distinguishable belts: the eastern belt (Yolla Bolly and Pickett Peak terranes), the central belt, and the coastal belt. Age and metamorphic grade of the belts decreases to the west (Blake and Jones, 1981). Formation of the accretionary complex began during the late Jurassic in the eastern belt and has continued into the Miocene along the western coastal belt. The complex trends NNW and is bounded by the San Andreas Fault to the east and by the coastal range fault to the west. The coast range fault separates the Franciscan complex with the partly coeval Great Valley sequence. Debate exists over the tectonic evolution of the Franciscan, centered around the geographic origin of the Franciscan rock units.
Characterization of the Three Belts
The coastal belt of the Franciscan Complex is composed of the youngest and least deformed units and makes up the western quarter of all Franciscan rocks. The rocks of the coastal belt are composed of arkosic sandstones, andesitic graywackes, and quartzofeldspathic graywackes interbedded with radiolarian chert (turbidite deposits) (Blake and Jones, 1981). These sedimentary rocks suggest a depositional environment of deep-sea fan systems with both oceanic and continental provenance. Parts of the belt show evidence of later metamorphism, principally due to subduction. Low-grade blueschist mineral facies are indicated by the presence of minerals such as laumonite and prehnite-pumpellyite (Blake and Jones, 1981). All rock units show evidence of thrust (imbricate) faulting due to the compressional forces of subduction. Ages of the coastal belt run from as little as 40 Ma (Eocene) to as old as 100 Ma (middle Cretaceous).
The central belt of the Franciscan Complex represents older and more metamorphosed units of rock best characterized as a melange. Blocks of graywacke, greenstone, chert, limestone, and blueschists are sheared and thrust upon one another in a choatic mix (Isozaki and Blake, 1994). In contrast to the coastal belt, metamorphism is higher in grade here and dominated by pumpellyite which formed within the matrix of graywacke (Hagstrum and Murchey, 1993). The mixing of these units makes a stratigraphic subdivision difficult but analysis of the graywacke slabs indicates that the depositional environment was also deep sea, near to the continent. Turbidity currents in this environment deposited much of the sediment in both the coastal and central belts.
The Precambrian Shield Rocks found in the Brickworks was formed in an ancient sea more than 1.4 billion years ago. Over many years, the heat and pressure from plate tectonics slowly pushed the land into a mountain chain. During the Ordovician period (around 470- 448 million years ago), the mountain chains This layer of shale and limestone is called the Georgian Bay
The site visited on this day was informally known as the Bedrock Knob (NTS grid reference: 120 342). It is in an area where patches of limestone and exposed bedrock are common. The bedrock is part of the Preca...
Simplicity clashes with stress. Living with the bare necessities, the working class families keep themselves happy. The husband works while the wife cooks the meals and takes care of the children. No desire for excessive amounts of m oney exists, just a desire for a strong bond within the family. Upper-class families or families striving for success invite stress into their lives. Too much stress from greedy desires of power creates tension in homes. The higher people c limb up society's ladder, the more likely their families are to fall apart. Flatland, by Edwin Abbott, presents the two dimensional world as a society with mostly working class families. A. Square, the narrator, enlightene d by a three dimensional experience longs to tell of the new knowledge revealed to him. Having no desire to learn of this foreign land called "Spaceland," the citizens of Flatland have A Square locked up. From past experiences, peo ple in Flatland know that new ideas cause turmoil amongst themselves. Focusing on having the basics for survival and a strong love within the family produces a peaceful and less stressful environment.
...e morphed it into the quartzite that is seen surrounding the butte (4). Rocks that undergo this process are called metamorphic rock, which is the same as the rock seen years ago by dinosaurs and other extinct creatures. The quartzite rocks were formerly seafloor sediment that was forced upwards, and then surrounded by lava basalt flows. Once erupted through fissures and floods through out most of the area, lava flow eventually created enough basalt to form a thickness of about 1.8 kilometers (1). All of this basalt flow eventually led to the covering of most mountains, leaving the buttes uncovered. The igneous lava flows and loess is reasons that the Palouse consists of such sprawling hills, and rich soil for farming (2). In result of the lava flows, the Precambrian rock Quartzite was formed. And lastly covered by the glacial loess, which were carried by the wind.
The Long Point Fault is located in Harris County, which covers 83,450 square miles located with in Houston, Teaxas City Limits. Research specifies that there are three sections of the Long Point fault that appear to be active; some sections of the Long Point fault have averaged more than 2 cm per year of vertical offset over the last 20 years. Evidence of the faults concludes it is a natural fault. The reason for activity is not caused by man, even though man’s activities are not helping the issues, but clearly humans are not the initial cause, biological activity can be in fact an adiitional cause for its movement. A brief description of the type of fault and its relationship with the strata and the faults beneath the Houston area, are at depths of 1,000 to 4,000 m. They have been well-defined through the study of well logs and seismic lines. Studies have resuted in assumuptions that some of these subsurface faults penetrate younger sediments at shallower depths, and contain faults that have of set the present land surface to produce recognizable scarps. (Gabrysh)
This sedimentary rock has hardened over the many years with sand shells, small pebbles, grains of sand and rocks of various sizes. In comparison to our 4.5 billion year old Earth, these sand shells might as well be brand new, when in reality they could be up to 1,000 years old. If the sandstone were to be replaced with calcite it would completely change the subclass of rock, it would then be chemical & organic limestone. The variation in sand stone is due to different rates of deposition and change in patterns of the sediment movement (Mc Knight, p. 384). These tightly compacted varying stones and shells will be weathered away by wind and waves over time and could eventually be reduced to a rock the size of your hand.
It is something that had nearly plagued parts of the world. Slavery had a negative impact on indigenous people and Africans earlier. Most of them were captured because of their racial origins. They were forced to work in terrible work conditions,and were paid less than a dollar. Child labour was one of the many horrible things children went through, because it was it put them at risk. Although slavery had been abolished by the Emancipation Act 1834, it still continues in many countries. Society has not responded enough to slavery because child labour is used to fulfill consumers with products by some companies today. For example, Joe fresh’s clothing is manufactured by poor paid workers at Bangladesh factories.Another example is Hershey, in West Africa , there are child labourers who harvest cocoa to produce these chocolates. Companies should not being using slavery as a method to increase their riches for less.Furthermore,it is not fair to pay less or none to innocent people for the wealth of companies. Another way to reconcile slavery is to provide these children with their basic
The sacred space of the Cathedral of Chartres in France and the Parthenon will be discussed in comparison with each other.
Morton, J. W. (n.d.). Metamorphosed melange terrane in the eastern piedmont of north carolina. Retrieved from http://geology.geoscienceworld.org/content/14/7/551.abstract
Love in William Shakespeare's Romeo and Juliet William Shakespeare examines the concepts of love in the tragic play
We have all at one point seen or read an article of young girls and boys being abducted or simply forced into manual labor. Many reasons have been given as to why child labor occurs in these foreign countries such as: poverty, low pay, and unskilled work. These foreign companies or sweatshops find it easy to simply abduct poor and uneducated children, and force them into slavery for little to no pay and horrible working conditions. This is because there is greater demand for low skilled, and low cost labor that employers prefer to fill with child labor, instead of having to deal with more expensive and less flexible adult employees. Throughout the years there has been an increase in the supply of child labor mainly because of young kids in
“Child slavery is a crime against humanity. Humanity itself is at stake here. A lot of work still remains, but I will see the end of child labor in my lifetime”, said Kailash Satyarthi. Child labor has been going on for many years now. Kids are having to work in terrible working conditions and making very little profit. Kids are usually from the age of ten to fourteen. They work on farms all the way to working in mills. Kids work in about every job they can. These kids are losing out on education, healthcare, leisure, and just even their childhood. This usually down the road leads to being in poverty because they didn’t have that education they
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Up until the Enlightenment, mankind lived under the notion that religion, moreover intelligent design, was most likely the only explanation for the existence of life. However, people’s faith in the church’s ideals and teachings began to wither with the emergence of scientific ideas that were daringly presented to the world by great minds including Galileo and Darwin. The actuality that there was more to how and why we exist, besides just having an all-powerful creator, began to interest the curious minds in society. Thus, science began to emerge as an alternative and/or supplement to religion for some. Science provided a more analytical view of the world we see while religion was based more upon human tradition/faith and the more metaphysical world we don’t necessarily see. Today science may come across as having more solid evidence and grounding than religion because of scientific data that provides a seemingly more detailed overview of life’s complexity. “Einstein once said that the only incomprehensible thing about the universe is that it is comprehensible” (Polkinghorne, 62). Yet, we can still use theories and ideas from both, similar to Ian Barbour’s Dialouge and Integration models, to help us formulate an even more thorough concept of the universe using a human and religious perspective in addition to scientific data.
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