The Wells Creek Impact Structure

The short story An Occurrence at Owl Creek Bridge by Ambrose Bierce is a short story about a man named Peyton Farquhar is about to be hanged. The story takes place during the Civil War and Farquhar is constantly thinking of his wife and children at home. He dreams that he is able to escape and run to safety, where he finds his wife. When he goes to hug her, he suddenly feels a strong pain around his neck. Farquhar is then hanging off the bridge with the noose still around his neck. He imagined all of this before he was hanged.

I chose this source from the National Archives due to its relevance to the era in which “The Occurrence at Owl Creek Bridge”, by Ambrose Bierce was written. This document stresses the life of Confederate citizens in relation to contact with Federal soldiers. It includes information about citizens loyal to the Confederate flag spying, violating military orders, citizens moving through military installations, citizens not surrendering to the Union, and citizens committing sabotage to Federal arms. Citizens also provided business firms and services to assist the Confederate war effort, even after being seized by Federal arms. Civilian businesses even northward provided Confederate espionage, deceit, and the hiding of Confederate guerilla forces.

The Slate Belt bioregion is nested within the Great Valley Section of the Valley and Ridge Province that was formed by thrust and fault folding during the Late Ordovician period through and Late Paleozoic era.(Bailey,1992; Geyer, 1979;Van Diver, 1990). During this time Taconian

Gerta Keller, professor of geosciences at Princeton University, has recently conducted research on the Chicxulub asteroid in which she analyzed new core samples taken from the asteroid site (Botzer 2004). These samples indicate that the impact that occurred at Chicxulub actually predated the mass extinction of the dinosaurs, which occurred at the Cretaceous-Tertiary boundary about sixty-five million years ago. Keller claims that the Chicxulub impact occurred approximately 300,000 years before the extinction (Keller 2004). Although previous researchers estimated that the Chicxulub asteroid was the cause of the extinctions, there had always been doubts about the exact age and size of the crater, and about the origin of the “mega tsunami deposits” that were located within the crater (Keller 2004). The focus of Keller’s recent research was on finding some answers to these questions. To do so she analyzed Cretaceous limestone, dolomite, and anhydrite deposits as the site of the Chicxulub crater (Keller 2004).

The three faults being considered are thought to have influenced the character of some 120,000 square miles. The Big Pine, Garlock, and San Andreas faults are all mutually active, deep, long, and steep and noted as being conjugate shears. In concert, the faults have defined a primary strain pattern of relative east-west extension and north-south shortening of the area of 120,000 square miles. The large region is noted for its deformity, with the source of this being a northeast-southwest counterclockwise compressive couple. The compressive couple was potentially supported through drag as a result of the deep-seated movement of rock material from the Pacific region (Hill & Dibblee, 1953). The interaction of the faults in the San Andreas region since the Jurassic period have served to shape and contour the present geology of the land, while a study of the paleontology of the region likewise requires such knowledge to effectively determine conditions at any given point in time.

Little Cottonwood Canyon is a site bursting with geological history, rock formations earthquake potential on the fault, prehistoric glacial formations, landslides, and many hazards associated with it. The Wasatch fault is bound to have a enormous earthquake in the future and has left behind numerous scars. The mountains have been engraved by glacial formations dated back to the Ice Age (~14,000 years ago). Rock falls and landslides have left hefty boulders as indication of erosion and moisture in the rocks. The hazards on this mountain range are mass wasting, radon, earthquakes, and flooding of Little Cottonwood Creek.

The impact of the bolide created what geologists call the “Exmore Crater,” which is thought to have been as large as the state of Rhode Island and as deep as the Grand Canyon (“Chesapeake Bay Geology”). The area was covered in Ice Age glacial sheets up until 18,000 years ago when climatic warming forced the sheets to melt and retreat, allowing new wildlife and plant species to appear. The melting water of the glacial sheets flooded into the Susquehanna, Potomac, James, and York rivers and eventually poured into the Atlantic Ocean, causing sea levels to rise. This rise in sea level, in turn, submerged the Susquehanna River Valley, and formed the rough outline of the present day Chesapeake Bay (”Bay

One of the major things noticeable from the cross section is that quite a few of the rock layers are over turned, where the older rock layers are above the newer rock layers. This is seen in the contact between the Quartz Monzonite of Papoose Flat and the Campito Formation which is also a disconformity. Next there is some fault zones separating the Camptio, Poleta, and Harkless formations. We then see some more overturned layers with the contacts between Saline Spring Valley Formation (lower and upper members) above the Mule Spring Formation along with some inferred folding. With a normal fault separating the inferred folding event, we see where the overturning occurs. In between the Cambrian layers we see Tertiary Basalt nonconformities also being folded, thus with that we know that the folding event was more recent than the formation of the Basalt. Next there is a large Basalt field with a spot of the Harkless formation. Again we see over tuning as the Basalt field ends there are the Devonian and Mississippian rock Layers on top of the basalt. Separating these overturned layers from the Harkless Formation and the Saline valley Formation (upper member), which are not overturned, is a thrust fault. From this information, there was a major stress event sometime after the Tertiary period causing the rock layers to fold and overturn. And from this stress event and from the folding, normal and thrust faults are formed. Finally we see that there were alluvial and landslide deposits from the Quaternary after the folding, faulting, and over

The U-high freshman biology class designed an experiment to test the question; based on the number of micro invertebrates, what is the water quality of the U-high creek? On 9/22/14, the day of the experiment, the conditions were recorded at 10:05 AM. The temperature was 55 degrees with a 6 mph wind, and 62% humidity. One of the observations of the creek is that there was some garbage and trash on the banks, although there was minimal amount. Another observation was that there was run-off leading into the creek from roads, nearby parking lots, and neighboring yards. There were about 40 small fish, only about 2-3 inches long swimming north against the current. The water was also very clear, and the bottom was clearly visible. Based on the observations

Neotectonic frames show comparable arrangements. Therefore, with respect to any given region the peaks of A-tents indicate comparable directions. New fault scarps have a tendency to be correlated with the territorial lineament

At Laurel Hill Duke Forest there is a large granodiorite cliff adjacent to a river on one side. This cliff is not smooth and has several parallel fractures instead of one steep slope. Observations of this cliff were taken in order to gather data and find possible explanations for why this cliff is where it is located and why the river adjacent to it follows a V-shaped path. One observation was that the range of the strikes and dips of the fractures facing river were all near parallel ranging from strike of 170-190 degrees and dips ranging from 70-90 degrees. There were other fractures oriented differently on other sides of the outcrop. Also, the surface of the outcrop was highly weathered in some parts where the rock type was not distinguishable without using a rock hammer and had moss growing over it.

A period of volcanism resulted in igneous intrusions within the Raton Basin-Sierra Grande Uplift Province that was sourced from the upper mantle about 26. 6 billion years ago and is associated with parallel dikes and sills (Higley, 2007). Igneous rocks are common within the Raton Basin and include Tertiary dikes and sills that range in age from 6.7 to 29 5 million years ago (Flores and Bader, 1999). One of the main differences between dikes and sills is that dikes are longer lived magma conduits and sills are features that form when magma is in neutral buoyancy with the surrounding rock (Rooper et al., 2006). These volcanic events are associated with hydrothermal alteration of coal within the basin (Higley, 2007).

The Arkoma Basin is one of several foreland basins that formed along the Ouachita Orogenic Belt during the Mississippian and Pennsylvanian time periods. It covers approximately 33,800 square miles and extends from southeastern Oklahoma to central Arkansas (Perry, 1997). The Arkoma Basin is bounded to the north by the Ozark Uplift, to the south by the Ouachita Mountains, to the northwest by the Anadarko Basin, to the southwest by the Arbuckle Uplift, and to the southeast by the Mississippian Embayment (Figure 5). The red box in figure 5 denotes the general location of the study area, which is in the eastern Arkoma section.

began to flow along weak layers that define the folds and faults and carved the resistant

The story that I chose to write about his week is “An Occurrence at Owl Creek Bridge”