Geology 111 Mid-Term Test 2017 V1. Print answer left of question number. 1. The

Question

Geology 111 Mid-Term Test 2017 V1. Print answer left of question number. 1. The following news article was published last May: KENDRICK, ID- The Idaho 7. List some lustres and an example mineral for each b) admantine (diamond |; earthy (kaolin], vitreous (quartz), metallic (graphite) Transportation Department and Idaho State Police say a landslide is it is how long the highway will be blocked. Avoid the area. L vitrecus (quarta), metallic (pyrite) The geology of this area is dominated by a thick series of basalt lava flows. What was the cakite) likely cause of this landslide? a) Basalt flows retain some of their original heat, resulting in lower shear strength in the lava b) Lava, especially pahoehoe type has a very slippery upper surface, made less stable by ej admantine (apatite); earthy (kaolin), vitreous (quartz), metalic spring rain. c) Frost wedging weakened the basalt column fractures, producing failure by mechanical are they? d) The road cut was too steep. Massive basalt flows have very weak shear strength. e) Paleosols commonly occur between the lava flows; these ancient soils are relatively very weak, creating slip planes. b) amethyst (purplel; rose (pink), milky (whitel, citrinelgreen); smokey (sky blue c) amethyst (purple); rose (yellow); milky (white; citrinelyellow]; smokey (grey/brown) d) amethyst (purple); rose (pink): milky (white); citrinetyellow; smokey (grey/brown) e) amethyst (purplel; rose (pinkl; milky (yellow); citrine(orange); smokey (grey/brown 2. High precipitation and warm temperatures. This is a recipe for the development of 9. Even engineers can see cleavage planes in minerals. Give an example of a mineral with one direction of cleavage, two directions, three directions, four directions. a) mica (1), feldspars (3); cakite (3); fluonite (4) b) mica (2); feldspars (2; calcite (4); fluorite (3) c) muscovitel1) ;biotite (2) halite (31: d) biotite (1): plagioclase (2); calcite (3); flucrite (4) b) Mechanical weathering and thick soils. 3. Loess, fluvial deposits, and glacial tills are all examples of a) residual soill c) soill horizons e) pedocals a) The solar wind swept away lighter elements from the closer regions, leaving only heavy, metallic materials to create the core of the Earth; further impacts created the bl Earth accreted as a h center to form the core, while the lighter material created the mantle. c) Early in its evolution, Earth suffered an impact by a large body that the young planet into space. Gravity caused many of the heavier pleces to draw together and form the core. The lighter pieces then formed the mantle around that core. d) The flow of the mantle beneath the crust caused plate tectonics, the movement of the large plates of rock on the surface of the Earth. Collisions and friction gave rise to the iron smass that gradually melted. Dense material sank to the This might occur because soil is saturated to full capacity, because rain arrives more quickly than soil can absorb it, or because impervious areas (roofs and pavement) send their water to a) erosion b) above land flow c) stream flow d) precipitation e) runoff 11. What are the four C's that are used to describe the value of a diamond? a) cut, carets, color, clarity bl cleavage, carets, color, clarity c) cut, carets, color, clusions d) cut, carets, c ement, clarity e) cut, cleanliness, color, clarity 6. Four minerals used on Mohs scale (#) contain caklum, what are they? a) Gypsum (5), Calcite (4), Fluorite (31. Apatite (2) bj Gypsum (2), Calcite (B), Fluorite (4), Apatite (5) c) Gypsum (2), Calcite (4), Florite (31. Apatite 05) d) Gypsum (2), Calcite (3), Fluorite (4). Orthoclase (6) el Talc (1), Calcite (3), Fluorite (4), Apatite (5)

Explanation / Answer

1. The most likely cause of the landslide is the unstability of the slopes. Unstability can be caused by many factors but here I think its caused by frost wedging which mechanically disintegrated the basalt flow and then as a result of having less shear stress, it got unstable and led to landslide.

2.Wet climate accelerates chemical weathering. And due to high precipitation, minerals breaks down faster and leads to thickened soils. So the answer is chemical weathering with thick soil.

3. Loess, fluvial deposits and glacial tills are examples of transported soil. They are being carried away or transported from their origin to far off places with the help of wind, water or glaciers.

4. Runoff is the flow of the excess water above the earth's surface when the soil cannot absorb or retain enough water.

6. Four calcite bearing minerals on Mohs hardness scale are gypsum,apatite, calcite, fluorite. Its option c.

7. The answer is b. Diamond shows adamantine lustre, graphite shows metallic, earthy lustre by kaolin and vitreous by quartz.

8. The answer is d. Quartz shows a range of colour varities.

9. The answer is d. Biotite having one, plagioclase two, calcite three and fluorite four.

10. The answer is b. Earth accreted as a homogenous mass. Later the dense matter sank down to form the core.

11. Cut clarity colour and carat are the four C's of diamond. So option a is the answer.

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.