What Is The Purpose Of The Precambrian And Phanerozoic Eras?

Minerals are what make-up Rocks and rocks are what make up the geology of an area. In this report, we will focus on the geology of Ontario through its rocks. We will look at ten difference rocks samples that have been collected from several different places here in Windsor Ontario including the beach, the river, gravel pits, along highways and roadways as well in parks and campsites. The rocks that were collected are all rocks that have formed right here in Ontario.

Found in the Appalachian Region, the Juniata Formation extends from central-southern Pennsylvania to Tennessee (Davies 2010). Though the thickness of the Juniata Formation is far from constant across its lateral extent, it is approximately 2000 feet thick in northern Pennsylvannia and thins towards the southwest (Crowder 1980). Named for the Juniata River running through southern Pennsylvania, this formation consists of sediments from the Taconic Orogeny in the late Ordovician period (Crowder 1980). Figure one displays the characteristic layers of alternating red sandstones and shales, which are divided into three distinct units (Darton

The Lynne deposit lies within the early Proterozoic Penokean fold belt of the southern province of the Precambrian Shield. The fold belt is divided into two major terranes in Wisconsin (Sims 1989). The first is the northern Penokean terrane, which contains major oxide facies iron formations and granitic intrusions (DeMatties 1989). The second major terrane, separated from the Penokean terrane by the Niagara fault zone, is the Wisconsin magmatic terrane, characterized by a volcanic island arc-basin assemblage (Sims 1989). This southern terrane lacks major oxide facies iron formations, but contains abundant tonalite-granite intrusions (DeMatties 1989). The Wisconsin magmatic terrane is further subdivided into the northern Pembine-Wausau terrane and the southern Marshfield terrane, which are separated by the Eau Pleine shear zone, a north-dipping subduction zone (Sims 1989).

The simulation is based on historical maps. I noticed that it was very important to know the different markings represent on the map. Opposing military forces were shown as different colored lines or dots. The longer and thicker the line, it meant that they had more troops. The different colors on the map indicated there were higher or lower levels of elevation. White represented the lowest ground and dark brown indicated the peaks of small hills. Ridges and hills were usually easier to defend and harder to attack. The blue lines represented creeks. Roads were indicated by black lines and were important to keep open in order to receive supplies and reinforcements.

There are two distinctive features present in this unit. The first is the syncline and anticline that extend across the map in a NEE-SWW strike, shown in Figure 5.1 (Need to fix map to show this). The second is the thermal areole found in relation to the Beinn an Dubhaich granite intrusion.

The quadrangle is considered to be a part of the Allegheny Plateau, so the rocks in this region are mostly of Carboniferous age. Carboniferous rocks are subdivided into two series: the Pennsylvanian and Mississippian. The rocks of both series mainly consist of alternating beds of shale and sandstone, but Mississippian rocks on southern parts of the plateau include thick limestones (Phalen 1). Both series are represented in the Johnstown quadrangle. The Pennsylvanian series, however, covers most of the region, while Mississippian rocks appear only at the surface along deeply eroded anticlines.

It consists of the state’s most unique landscapes – strangely long, tapered and almost parallel ridges and valleys, all mingling over water gap formations. The province extends from the center towards New Jersey (north-eastward) and into Maryland (south-westward). The province’s ridges and valleys are made up of Sedimentary rocks from the Paleozoic Era. Metamorphosed Proterozoic volcanic rock (~575 million years old) is also found in some ridges of the South Mountain sector of the province. The sediments were originally deposited in a horizontal manner, but then these rocks were subjected to a high amount of heat and pressure during the Alleghanian orogeny, which resulted in them being folded and angular. The erosion of sediments over the years have formed a very distinct landform – valleys have been formed over areas of shale and limestone (softer rocks) and ridges have been formed in the areas of sandstone (harder rock). This Province is divided into 7 sectors: South Mountain, Great Valley, Blue Mountain, Anthracite Upland, Anthracite Valley, Susquehanna Lowland and Appalachian

What is interesting about this paper is the author’s purpose. It seems as though he is attempting to raise awareness and support geophysics. However, all the points he brings up to discuss he quickly refutes with dangers. This confuses the reader as the article is more intimidating rather than informational. The overwhelming sense of danger associated with each

The objective of the trip to Blount Springs, Alabama was to observe and gather data on the geological structure of the area. Blount Springs is located in the northern part of Alabama just 33 miles north of Birmingham, and lies on the southernmost part of the Appalachian fold belt. The field work began on the morning of Saturday April, 7th at 8:50am. The weather was cloudy with temperatures in the mid 40’s, and the area was wet from rain the previous night. Our materials included a map of the area, list of formations, a Brunton compass, and a Rite in the Rain field book. The procedure of the field work involved 12 stops at outcrops to gather data, one stop was omitted from the original plans. This data gathered included bedding and joint orientations

Hildebrand, (2009, 2003) attempts to integrate both observed geologic features (hinterland high grade metamorphism, Laramide basement uplifts, Cordilleran batholiths, regional-scale Neogene extension) and the lack of observed features (large scale strike/slip faults), while matching paleomagnetic data (large amounts of northward motion in the oceanic realm exist with no evidence on land) (Fern Esperanza beetle-Moorcroft, MS Thesis, 2014).

The basement rocks in the western Slave carton is older than 2.8 Ga and the known oldest rocks are the genesis found along the Acasta River which is about 3.6- 4.0 Ga old, which is estimated using the zircon dating (Isachsen & Bowring, 1994; Padgham,1992). Following by 2.8 - 3.5-Ga old genesis of Point Lake and genesis under the Yellowknife Greenstone belts, which exist over 3 Ga (Isachsen & Bowring, 1994; Padgham,1992). The major rock types include granitic to tonalitic genesis, migmatitic genesis and granodiorites, which have been deformed and metamorphosed (Fyson & Helmstaedt, 1988; Isachsen & Bowring, 1994; Padgham,1992). In the eastern Slave Craton, the basement is not confined but is correlated to the Nd-Pb isotopic boundaries

The Blue Ridge Mountains in North Carolina is a diverse geological area to study tectonic setting, metamorphic and igneous rocks, and how the tectonic history has affected the development of the minerals in the area.

The Kaibab Limestone is found at top elevations. Limestone is usually found on sea floors, so this to me could mean a transgression.Youngest rock layers are usally laid last and the oldest layers are laid first. This is what they call the principle of superpositioning. Because the layers of rocks are horizontal this follows the principle of original horizontality. Some of the layers on the Colorado plateau are tilted. The tilting of the rock layers created a plateau for the creation of the Colorado river. There is thought to have been some sort of geologic event happen here such as a fault. A fault happens when tectonic plates move as a transform, divergent, convergent boundaries, and either cause a strike slip, normal or reverse fault. Often when this happens there will be brittle deformation of the rocks but because there was no significant alteration of the rocks, questions still arise as to how it actually

Glaciation that are widespread can be identified based on the subglacial tillite, which is a thick layer of sediments that settle down beneath glaciers or ice caps. On top of this subglacial tillite layer is deposited marine carbonate, also known as cap carbonate. Based on their paleolatitude designated by glacial sediments’ paleomagnetism, it can be determined that these deposits are from equator region. The interaction between two types of sediments, marine (like carbonate) and subgacially deposited sediments, indicate that the glaciers had approached marine coastlines.

If dividing the map into the right part and left part, it can be seen that in the top right part of the map, most of the areas are in the color of red, orange, yellow, green, and light blue. There are sealed roads in the white areas. Most of the lower right areas are in white while some of the small areas are in dark blue and some of them are in light blue, green and yellow. The sealed roads are in both dark blue and white areas. Most of the left areas are in dark blue, light blue and green except for the top left corner are in white. Both of the dark blue and white areas have sealed roads.