The Importance Of Strath Suardal Formation Of The Durness Group

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).

    C.quartz chert.   Correct  D.shale.   Answer Key: D   Feedback: The correct answer is D. shale.     Question 18 of 33 3.03/ 3.0303 Points Specimen #16 is composed of Correct  A.silica.     B.calcium carbonate.

AMS analyses were useful in redefining the principal foliation, but did not aid in determining lineations or direction of shear sense. Nevertheless, these analyses in combination with local mapping tentatively point to the following sequence of events: 1) deposition of the Westboro; 2) greenschist facies metamorphism forming the principal foliation; 3) contact metamorphism, recorded by the formation of large cordierite porphyblasts; 4) mylonitization; 5) extrusion and deposition of overlying felsic flows and pyroclastic deposits; 6) intrusion of the Dedham granite (ca. 610 Ma) and possible retrograde metamorphism of porphryblasts; 7) additional contact metamorphism, recorded by unaltered cordierite aggregates rimming porphyroblasts; and 8) brittle deformation evidenced by thin bands of cataclasite in the Dedham. Rotated porphyroblasts and S-C fabrics in the mylonites record a dextral transpressive sense of motion possibly along a restraining bend of a transcurrent system. Therefore mylonite blocks in the debrite are not easily explained by simple resedimentation in a rift

Next, we can see that the rock displays a subtle porphyritic texture with plagioclase comprising the phenocrysts. The overall texture of the surrounding groundmass is granoblastic equigranular. Under thin section we also see a weakly defined foliation evidenced in the preferential alignment of actinolite grains and to a lesser extent chlorite grains. Undulose extinction is also observed in quartz indicating the rock was subject to deformation. The normalized quartz, alkali-feldspar, and plagioclase (QAP) values of this rock indicate that it is classified as a grano-diorite according to the IUGS QAPF classification system which is consistent with the hand sample interpretation.

This formation is a very fine grain Mississippian limestone. To test to see if this was the Bangor formation we used HCL and because there was a reaction we know its limestone. This formation could also be described as gray in color as well as an average thickness of 700 feet. We see the Bangor until stop eight, where we see a very different vertical bedding. Also different at stop eight is the outcrop no longer reacts with HCL. From this we gathered that we had moved into the Hartselle formation. In the Hartselle Formation, Mississippian aged sandstones are dominant. This particular stop had a large amount of jointing. After the Hartselle, we figured the Pride Mountain Formation would be next, however at stop nine we see the Maury Formation present. This stop focused on the rock located inside the creek. Because we were unable to go into the creek to get the strike and dips, we once again had to do a projected orientation. Also found on this stop were natural sulfur springs, easy to notice with the smell that it gives off. The Maury formation consist of Mississippian- Silurian aged shale. At the next stop, stop 10, we encounter the Ft. Payne formation. Although this area location was thickly vegetated, we were able to conduct the acid test and saw that the HCL reacts in some places but not all. From this we concluded that this was the cherty limestone of the Ft. Payne formation. The following stop, 12, we went up section and arrived at the Maury Formation once again. At the final stop, location 13, we see Ft. Payne Formation. All of the metamorphism and deformation in the southernmost Appalachians can be related to the movement of the thrust sheets and stacks (Higgins,

Lyons sandstone can be divided into two distinct types which are the red and grey facies. The red facies are the red- colored sandstone which contains no hydrocarbons and the gray facies are the white to black- colored sandstone which contain hydrocarbon in its matrix (Levandowski,

There are coarsening-upward sequences preserved, with flooding surfaces represented by low-relief erosional contact of trough-cross-stratification (runnel) upon low-angle planar bedding (swash zone).

The latest rocks in this region were formed in Pleistocene time as imperfectly consolidated gravel of river terraces and alluvial deposits of the

Robert Tilling, & American Geological Institute (2000, May). Geotimes - May 2000: Feature Mount St

The Glasshouse Mountains are volcanic plugs that were originally surrounded by sandstone (MSCR, 2012). The plugs are formed of material that is more resistant to erosion than the sandstone that once surrounded it, and the plugs were revealed when the softer rock eroded away (Tourism Australia, 2015). The weathering of the sandstone is evidence to support the existence of

The collection of the rocks was based on just picking up the most amount of difference looking rocks that was possible and bringing them home to analyze. This was done for about two months from many difference locations including campgrounds, beaches, rivers, highways as well as construction sites. After about two months there were many rocks so I started to analyze and take out the rocks that were of the same kind. I found many granite, basalt and conglomerate rocks.

It is currently the largest exposed granite in the world weighing approximately one trillion pounds; although, only one third of the mountain can be seen as a majority of the mountain expands below ground as far as North Carolina. The enormous pluton mountain, as scientifically identified by geologist, was formed by a complex folding and faulting that had subsequently created the Blue ridge mountains. Though what remains as a mystery to many geologist is as to how such a massive granite mountain has become exposed. Although there are several theories that have been publicated to explain such a phenomena none are substantial or advocated the most. While the origins of Stone Mountain are elusive, the correlations of this landmarks with american history are intricately

Mr. Hyland is trying to find suitable markets for expanding his granite rock business profitably by relinquishing some control of his business. Mr. Hyland is also concerned with achieving a balance between his local business interests and family life in Canada.

The first sedimentary rock unit that occurred during the Sevier Orogeny is the Kootenai Formation. This formation consists of four members; each has a distinct characteristic. The first member of the Kootenai Formation is a clastic unit with a high energy system. The second member is the middle limestone unit that indicates the activity of folding. The third member is similar to the first member as it is also a clastic unit; however, the upper clastic member has a finer grain size compared to the lower member, which indicates a narrow channel deposition. The upper clastic unit marks the start of Laramide orogeny, where the thick skin deformation began to occur. The fourth and the last member of the Kootenai Formation is the Gastropods limestone. Gastropod limestone formed a border between the Kootenai Formation and the Blackleaf Formation. This formation took place during the emergence of the Western Interior Seaway. Blackleaf Formation consists of the Flood member and the Vaughn member. Flood member is a clastic sandstone that has a high energy depositional setting, while Vaughn member has a low energy depositional environment such as the shallow

The best exposure to of rocks can be seen in road cuts, because they the great variety in the rock types and formations within the area. Stray fragments of rocks can be found in mass quantity alongside the river, held back from the road by barriers, or as a cut face that is parallel to the road. You can clearly see the different intrusions along the roadside, dikes running along crevices, and many instances of solid rock blasted in order to clear a way for the road. These mass capacities of the same rock are plutons that have been uplifted over geologic time1. Tonalitic plutons consisting of primarily granodiorite and quartz are all over the Cascade Range, forming the Grotto/Index (~25m.y.) and Snoqualmie (~18m.y.) Batholiths of common rock types. More recent Swauk sedimentary structures are seen as overlap from the nearby Blewitt (formerly Swauk) Pass region, likely formed as result of the last ice age1,2,5. These sedimentary layers fade out deeper into the mountains, as the igneous intrusions become more predominant within the range. White and black-grained diorite is common and clearly identifiable as well as amphibolite if looking around the Wenatchee or Skykomish River where it has been broken, carried, and eroded to land on its banks (figure 5). Biotite schist, hornblende, and quartz intrusions are not uncommon, seeing a new kind of whether solid or with distinct dike intrusions at each roadcut.5 Location specific granites have been mined as well as gold and silver