GEOE 203 Fall 2023 Exam 2
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Geology
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Jan 9, 2024
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User Xxxx*xxxx Course GEOE 203: Earth Dynamics - 01708 - F23 (ONLINE) Test GEOE 203 Fall 2023 Exam 2 Started 9/29/23 11:57 AM Submitted 9/29/23 12:38 PM Due Date 10/1/23 11:59 PM Status Completed Attempt Score 49 out of 50 points Time Elapsed 40 minutes out of 1 hour Results Displayed Submitted Answers, Feedback •
Question 1 1 out of 1 points Foliated means: Selected Answer: minerals reorient to line up somewhat •
Question 2 1 out of 1 points A magma body that cools underground is called Selected Answer: intrusive •
Question 3 1 out of 1 points If magma intrudes into country rock by cracking it and flowing horizontally between two sedimentary layers, lifting the landscape upwards it is called a: Selected Answer: Sill •
Question 4 1 out of 1 points Which of the following deposits fine sediment? Selected Answer: all of the above •
Question 5 1 out of 1 points Which term is used for an igneous rock that cooled quickly? Selected Answer: Aphanitic •
Question 6 1 out of 1 points As a very hot magma begins to cool which of the following will solidify first? Selected Answer: Olivine and Pyroxene
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Question 7 1 out of 1 points If an igneous rock has a glassy texture it: Selected Answer: cooled too quickly to crystallize •
Question 8 1 out of 1 points What makes magma rise? Selected Answer: hotter magma is less dense than colder rock, so it rises •
Question 9 1 out of 1 points As rock is heated up which of the following will melt first? Selected Answer: Quartz and Muscovite •
Question 10 1 out of 1 points Which pair of igneous rock types listed do NOT have the same composition as each other (does not make a matched pair)? Selected Answer: Diorite and Rhyolite •
Question 11 1 out of 1 points The four types of sedimentary rocks are: Selected Answer: chemical, organic, biochemical, clastic •
Question 12 1 out of 1 points Because of the waves beach sediment is usually Selected Answer: well sorted and rounded •
Question 13 1 out of 1 points Which of the following has the highest grade metamorphism? Selected Answer: Gneiss •
Question 14 1 out of 1 points
What are the two intermediate igneous rock types? Selected Answer: Andesite and Diorite •
Question 15 1 out of 1 points Low grade metamorphism of shale will form: Selected Answer: Slate •
Question 16 0 out of 1 points Which magma body cools the fastest? Selected Answer: a large flat sheet of magma •
Question 17 1 out of 1 points Which fine grained rock is most similar in mineral composition to Gabbro? Selected Answer: Basalt •
Question 18 1 out of 1 points Sediment grains become rounded primarily during: Selected Answer: transportation of the grains •
Question 19 1 out of 1 points Which setting would have sedimentary deposits that were well sorted, well rounded, and mostly quartz? Selected Answer: beach •
Question 20 1 out of 1 points The smallest detrital grains found in sedimentary rocks are: Selected Answer: clay •
Question 21 1 out of 1 points What is Lithification? Selected Answer: Transformation of loose sediment into solid rock •
Question 22 1 out of 1 points
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Occasionally The Earth is struck by a comet or an asteroid, as pictured below. What type of metamorphism does this cause? Selected Answer: Shock metamorphism •
Question 23 1 out of 1 points Sills, dikes, and plutons are all examples of what kinds of rock setting? Selected Answer: Intrusive •
Question 24 1 out of 1 points What is the name of the marine environment where sediments are dropped where a river enters the sea? Selected Answer: Deltas •
Question 25 1 out of 1 points Diagenesis is defined as Selected Answer: the physical, chemical, biological changes to sediment •
Question 26 5 out of 5 points Describe the level of sediment sorting cause by glaciers and explain why it is sorted that way. Selected Answer: The level of sediment sorting in glacial till would be poorly sorted because ice carries all sediment sizes. Response Feedback: [None Given] •
Question 27 5 out of 5 points Describe the sediment sorting and roundness you would expect to find in a river and explain why. Selected Answer: Thus as the water speed changes, different sized silt is carried, dropped, separating and sorting it. This causes the sorting to be moderate to well- sorted. Once you leave the river's very beginning, the silt becomes moderately to well-rounded because all the movement of the sediment causes the sediment pieces to bump into each other causing scouring and abrasion and smoothing out sharp corners, resulting in rounded sediement. Response Feedback: [None Given] •
Question 28 5 out of 5 points Tell me the different things that are common cements which hold the grains together in sedimentary rocks. Which one will react with acid?
Selected Answer: Three common cements in sedimentary rocks are quartz, calcite, and hematite. However, calcite will react with acide. Response Feedback: [None Given] •
Question 29 5 out of 5 points Describe a Turbidity Current and the sediment layers that result from it. Selected Answer: In the turbidity, sediment moves on a slope as a pulse of turbid water as velocity slows contents settle course contents settle first, finer settle last. Response Feedback: [None Given] •
Question 30 5 out of 5 points Why are there so many foliated rocks in the Himalayas? What type of rocks are foliated rocks (out of the 3 basic rock types)? Selected Answer: The collision of two plates resulted in the Himalayas being created. Due to this collision, there was a tremendous quantity of heat and compression. Region wide metamorphism was the result. Foliated rock are metamorphic rock. Response Feedback: [None Given] Sunday, December 31, 2023 5:23:38 PM CST