Term Examination

              TERM  EXAMINATION  IN  PHYSICAL  GEOLOGY. B.J.C.  MAY 31,1946,
1. a) In what respects do wind deflation and wind abrasion agree? now are
they different?
b) Of what materials may a dune be made? Just how does a dune travel?
2. a)Vihat is meant by the term "sea"? (b) Kake a complete profile drawing of
the depth zones out beneath the sea. (c) Why on a given coast are there
two high tides every 24 hours?
3. a)How is an offshore bar or "barrier beach" built? lb; What four types of
shorelines are there? Explain each briefly.(c) Name types of coral reefs.
4. a( By what processes (named) do sediments become coherent rocks? (b) What
markings characterize sed. rocks? (c) Define or describe a sedimentary
formation. Name two examples.
5. a) Copy blackboard drawing and give the story of its changes in chronological order.Label drawing carefully,, .
( b) What are the colors of sede rocks due to? Give examples.
(c) What conditions are necessary for fossils to form and be preserved?
6. a) Define igneous rock, (b) What kinds (names) of volcanic rock are made
from pyroclastic material? (c) Name the igneous rock textures.
7. a) Discuss the bases for classifying igneous rocks, lb; i*ame the kinds of
volcanic cones or edifices.Give one example of each kind.ose Idaho
examples where possible.
P. a )Give a brief but accurate history of tot. toazama and present Crater bake,
(b) Pumaroles & hot springs:1.Gases emitted. 2.Metallic deposits (sometimes)
3.Non-metallic deposits.4.Are they indications of increasing or declining
volcanic activity?
9. a) Define diastrophism.(b) What classes of structural features are imposed
upon bedrock by diastrophism? (c) What are joints in sed, rocks?Two causes?
10. a) What causes of joints in igneous rocks? (b) Make a diagram to show the
components of motion in a normal fault (oblique kind;.Label the drawing
c
What kind of faultig repeats the beds on the outcrop?
offsets i
11
(a) State four field evidences indicating faults beneath, (b) What are
two recognized causes of earthquakes, (c) What initiates a submarine
earthquake and resulting tsunamis?
12. a) What sets of earthquake waves are there in and upon the earth? What
speeds do they have? (b) What safeguards against earthquake damage can
be sustRested? (c) What geologic work,if any,is done by earthquakes?
13. ROCK METAMORPHISM: a) Means what? (b)What that is new is produced?
(c)What factors do this work? (d)What kinds of rocks worked upon?
(e)What kinds of meatmorphism?
14. (a) What are the metamorphic equivalents of the following rocks?:
Pure white limestone; impure limestone; coal(softj; silicate rock;
sandstone;shale or clay;granite;basalt.
(b)What is a mylonite? How caused?