WEE_02a_PRA_02-MARTINEZ_MADISON-fillable_form_JS22
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University of Colorado, Boulder *
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1150
Subject
Geology
Date
Apr 3, 2024
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3
Uploaded by ConstableSwan2255
GEOL 1150: Water, Energy, & the Environment (WEE) Pre-Recitation Activity 0
2: How Fluids are Stored in and Transmitted (Flow) thru GM Purpose:
This Pre-Recitation Activity (PRA) provides you the opportunity to review and apply what you learned in the readings and lecture. This PRA is a lead into the RPE, which builds off this activity. Instructions:
Step 1:
Save this file to your computer with the following file name: WEE_PRA_02_LastName_FirstName
[---> enter your last name and first name] Step 2:
Type your answers to the questions below into this file. Step 3:
Submit/Upload your completed files to Canvas. Step 4:
Print and bring a paper copy of your completed PRA to your recitation period. Objectives:
After completing this assignment students will be able to … 1.
Describe the characteristics of different types of rocks, especially in terms of grain size and grain packing.
Part 1: Three Rock Types Apply what you learned from the assigned readings and lectures to answer the questions below. Some of these questions require to not only repeat information but to think about what you learned and apply it. In addition to answering the questions, also be able to later recall information provided in the lead up to each question. Q1. SEDIMENTS
form when older parent rocks are weathered (i.e., broken down) and eroded (i.e., transported from location of origin to another location) to produce loose or unconsolidated grains of mud, sand, and gravel. These grains are dispersed as discrete and often rounded grains that eventually accumulate in rivers, deserts, lakes, shorelines, deltas, and the ocean. Which of the following best describes the grain packing of well sorted (i.e., grains are all similar size) rounded sediments? Check one:
tightly interlocking grains, that are often aligned with one another, with no pore space in between grains
tightly packed grains, with hardly any pore space in between grains
weakly packed grains, with some pore space in between grains
very weakly packed grains, with a lot of pore space in between grains
Q2. Which of the following best describes the grain packing of poorly sorted (i.e., grains exhibit a wide range of sizes) rounded sediments? Check one:
tightly interlocking grains, that are often aligned with one another, with no pore space in between grains
tightly packed grains, with hardly any pore space in between grains
weakly packed grains, with some pore space in between grains
very weakly packed grains, with a lot of pore space in between grains
Q3. IGNEOUS ROCKS
cool between 600°C and 1200°C. Which of the following best describes the grain packing in igneous rocks? Check one:
tightly interlocking grains, with no pore space in between grains
tightly packed grains, with hardly any pore space in between grains
weakly packed grains, with some pore space in between grains
very weakly packed grains, with a lot of pore space in between grains
Q4. Plutonic
(syn. intrusive) igneous rocks form when hot magma cools below the Earth’s surface underground. These intrusive
(syn. plutonic) igneous rocks form by the very slow cooling of hot magma. These rocks are often multi-colored. This slow cooling process forms what size mineral crystal grains? Check one:
too small to see with the naked eye
large enough to see with the naked eye
Q5. Volcanic
(syn. extrusive) igneous rocks form when hot lava cools at or above the Earth’s surface. These extrusive
(syn. plutonic) igneous rocks form by the relatively fast cooling of hot lava. These rocks are homogeneous in color. This relatively fast cooling process forms what size mineral crystal grains? Check one:
too small to see with the naked eye
large enough to see with the naked eye
Q6. METAMORPHIC ROCKS
form when an existing parent rock is subjected to heat (up to ~700°C) and buried deeply (>30km) within the Earth. Heat and pressure can cause crystal mineral grains to align in one direction, get larger, and possibly segregate into bands of different minerals. Which of the following best describes the grain packing in metamorphic rocks? Check one:
tightly interlocking grains, that are often aligned with one another, with no pore space in between grains
tightly packed grains, with hardly any pore space in between grains
weakly packed grains, with some pore space in between grains
very weakly packed grains, with a lot of pore space in between grains
Q7. ROCK IDENTIFICATION
. Inspect the following four figures from Lec 2 readings on roc
k
s
: Fig
.
2.11A (p. 15), Fig
.
2.12E (p 17), Fig. 2.13G (p.18) Use these figures to identify the type of rock and to name
it. Rock Specimen 7.a:
Rock type
is (check one):
igneous rock
metamorphic rock
clastic sedimentary rock
The name
of this rock is: __________________________________ Rock Specimen 7.b:
Rock type
is (check one):
igneous rock
metamorphic rock
clastic sedimentary rock
The name
of this rock is: __________________________________ Rock Specimen 7.c:
Rock type
is (check one):
igneous rock
metamorphic rock
clastic sedimentary rock
The name
of this rock is: __________________________________ Part 2: Rock Characteristics
Q9. ROCK CHARACTERISTICS
determine how much fluid a rock can store and how readily fluid can flow through it. In your own words, compare the grain size, shape, and packing of Rock Specimen 7.b and 7.c above. (Even though you are not being asked to do so here, you should also be able to do this for Rock Specimen 7.a.) 7.a
7.c
7.b
To submit/upload your PRA
to Canvas, follow the instructions below: Step 1: FILE TYPE
. Before submitting your PRA
to Canvas
, make sure your FILE TYPE is .pdf
If we cannot open it, we cannot read it and it will not count as a submitted assignment. Step 2: FILE NAME
. Before submitting your PRA
to Canvas
, save it with the FILE NAME shown here: WEE_PRA_02_LastName_FirstName
[---> enter your last name and first name] Step 3: Upload.
To submit your PRA
to Canvas, follow these steps: 1.
Click on "Assignments" in the Canvas left-hand menu.
2.
Click on "
PRA: Pre-Recitation Activities."
3.
Click on "
PRA
02."
4.
Click on the “Submit Assignment” button in the upper-right quadrant of the screen.
5.
Click on "Browse."
6.
Single-click on the file you want to attach, and then click on the "Open" button.
7.
Click on the blue "Submit Assignment" button in the upper right-hand quadrant.
Step 4: Print and bring a hard of your completed PRA to the recitation period.
Due Date: Pre-Recitation Activity (PRA) 0
2 is due at least 30 min before your scheduled recitation period begins.
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