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Idaho Springs Formation Report

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After we went in three different field trips, Red rocks park, North Table Mountain and Bob weimer trail. I realized that Golden is place for many geological history. In each field trip, I got to know more about the city and how those mountains came into being. In this geological history, I will mention the formation of the rocks from oldest to youngest.

On the field trip to red rocks park, the first stop was next to the parking lot. The Idaho Springs formation, which considered the oldest among the formations we went through. Its 1700 millions years. The name of the rock is Gneiss Idaho springs and it doesn't have a grain size. Some of the minerals in the rock were K-feldspar, quartz, Biotite, and Hematite. The environment of deposition would …show more content…

The fountain formation is almost 300 million years. The rock we found here was a sedimentary rock, and its called conglomerate. its grain size is less than 1 millimeter. The minerals its contain are Hematite, K-feldspar, quartz, and biotite. We can say it deposited in form of alluival fan - Bajada which in the base of the mountains. The Fountain formation created the Ancestral rocky mountains.

The third oldest formation is the Lyons formation, which is approximately 270 million years. The rock found here was a sedimentary rock; sandstone. its grain size is less than 1 millimeter. Quartz, Hematite, K-feldspar and Muscovite are the minerals in rock. Lyons formation was deposited in a beach dudes environment. Golden city faced a transgression in sea level which was the event recorded for our third formation.

The next site in our second stop we learned about Lykins formation. The rock found at this site was a sedimentary, Lykins sandstone, the grain size is less than 1 millimeter. Hematite, Gypsum, Halite and Calcite are the minerals in the rock. Lykins Formaion is almost 260 million years. Shallow water - sea water is the environment of depositions for Lykins formation. A transgression of sea level, and permian extinction are the events recorded for Lykins …show more content…

The Morrison Formation is approximately 150 million years. Sandstone and mud are the rocks found here. The grain size is less then 1 millimeter. Quartz, Hematite, Clay, and Iron are the minerals in rocks. Morrison formation was deposited in river and swamp lakes environment. The event recorded here was regression of sea level.

In our next site, at the Dakota Sandstone Formation. Sandstone is the rock name, and its grain size is less than 1 millimeter. Dakota Sandstone Formation is 100 million years old. Hematite, quartz, and clay are the mineral in rocks. It was deposited in beach from environment. The event recorded here is a transgression of sea level (intercontinental seaway).

Benton Shale Formation was our next stop. Its 90 million years old. Its grain size is clay and its contain clay and bentonite as the minerals in rocks. it was deposited in a beach environment (shallow sea). The formation recorded a transgression of the intercontinental seaway.

Pierre Shale Formation was our next stop. Pierre Shale Formation is 80 million years old. The grain size and mineral is clay. Pierre Shale Formation recorded the transgression of intercontinental sea

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The poorly sorted nature of the conglomerates, considered with the inclusion of wood fragments in the older conglomerate members and the graded sandstones and mudstones throughout the formation suggest deposition occurred through successions of debris flows. Presence of volcanics in the lithic fragments further indicate volcanic activity in the process of sedimentation as well—as debris flows associated with lahars are the likely source of the slope failures. Deposition environment was moderate to deep marine, as mudstone deposits require low energy depositional environment, but the style of sedimentation indicate deposition was not on a continental shelf. This is further supported by inclusion of the large overturned clast from an older member within the formation. Cross-bedding, graded bedding, and scouring surfaces provide 3 lines of evidence establishing the northern contact of the formation as the original upward oriented surface.

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Since the location was near to the Maribyrnong River, the procedure must be further stimulated by the existence of the river in the ecosystem, and this is happening from the further upstream. As for the downstream, it carried by the sediment that deposited at the riverbanks of the Maribyrnong River. Weathering and erosion of the primary rock in the early stage were leading to the deposition of sediment, and the younger sediment progressively replaced the older sediment which along the riverbank (Figure 2.3). Further away from the Maribyrnong river a little bit where the river flow was gradually rapid, some Marine deposits from the Ordovician Period was found such as mudstone, interbedded shale and greywacke, which may

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Geologists have found that the oldest exposed rocks in the national park to date back to 75 million years. The formations resulted from sediments that were largely swept into the area due to the rise of the Rocky Mountains. This eventually resulted in a rising of land above sea level. The deposits consisted of different strata of dark shale beds, many containing fossils of marine life from the Seaway (Stoffer 2003).

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The water that was created from the glaciers melting carried out a great deal of the leftover debris, which was sorted into different sizes such as gravel or pebbles, sand, silt or clay. All of the leftovers started to form in layers or beds in river ways, ponds, and in lakes to form what the geologist call glacio-lacustrine formations. Glacio-lacustrine formations is just a scientific phrase for a glacier melted and the materials that had been inside the glacier deposit into the lakes and rivers created by the melted

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Bingham stared in amazement”. This evidence inside this source was recorded in 1911, which was about 100 years ago. Explorer Hiram Bingham was the first to find the site ever since its abandonment 300 years before this discovery. He looked at this

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The Navajo Sandstone was displaced in a wind-blown space made out of broad sand dunes, similar to of the present day Sahara Desert. In a circumstance where it is windy, there are two vital sorts of stores, which are rises, embodied by endless scale trough cross stratification; and inter dunes, which are the level lying locales between slopes. The Navajo Sandstone originates in an unlimited sand sea, which extended over by far most of Utah and furthermore parts of New Mexico, Arizona, Colorado and Wyoming. Despite the way that the stone formations are known by particular names in differing zones, all places had a bit of influence on this noteworthy sand sea structure.

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Fluid magma below the highlands of what is now Lake Superior spewed out to its sides, causing the highlands to sink and form an immense rock basin that would eventually hold Lake Superior. In time, the fracture stabilized only after 570 million

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Monument Valley is the region of the Colorado Plateau characterized by a cluster of vast sandstone buttes and Antelope Canyon is a slot canyon was formed by erosion of Navajo Sandstone primarily due to flash flooding and secondarily due to other sub-aerial processes. When we entered in these areas, we saw the marvelous spectacle

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Below Yellowstone’s surface lies molten rock that formed the land that is Yellowstone today (Nat'l Park Service U.S Dept. of the Interior). 16.5 million years ago repeated volcanic eruptions moved the parks tectonic plate over a shallow body of magma. This move of the tectonic plate is what causes many of the hydrothermal features in Yellowstone. (Nat'l Park Service U.S Dept. of

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