*** BRING PHOTO ID *** Question/Answer Session = Monday (September 27) Geology 100 Exam #1 Format ~22 Multiple Choice, ~16 True/False, ~12 Matching ~20% from Discussion/~80% from Lecture Coverage First 4 Discussions (Topographic Maps I - Eye for Rocks) Corresponds to Chapters 1, 2, 4, and 5 in Discussion Guide Lectures #1 - 9 (Why Study Geology? - "Hard Rock"-Igneous/Metamorphic Rock) Tuesday (September 28) 7 - 8 pm (NOTE: Normal Lecture meets at 10 am and Noon on Wednesday, September 29.) 228 Natural History Building (last names A - L) 100 Materials Sci. Eng Building (1304 W. Green Street, Urbana; last names M - Z) *** BRING PHOTO ID *** Question/Answer Session = Monday (September 27) 5 - 6 pm 228 Natural History Building Previous Exam #1 is available on home page of class web site. No answer key is provided with old exam. Attend Question/Answer session for answers. Conflict Exam Format = 15 Short Answer questions Level l of difficulty = Similar to regular scheduled Exam Sign up before or after lecture or by email to Prof Altaner Wed.29 September 5 -6PM, 260NHB(GEOL 100 Discussion room) See Frequently Asked Questions #23, 25, and 32 for advice from Prof. Altaner on how to prepare for the exam.  

Identification of Rocks is by texture and composition Rocks are aggregates of minerals Identification of Rocks is by texture and composition Texture is the size, shape and arrangement of grains Composition is the minerals in the rock.

Grain Size Fine Medium Coarse Glassy

Arrangement – Cemented Page 29

Arrangement – Interlocking Page 30

Arrangement - Foliated Page 30 Arrangement - Frothy

04_02.jpg Igneous Rocks Page 31– cooling of magma or lava. Intrusive and Extrusive Composition: silicic, mafic, intermediate

Sedimentary Rocks Page 31 Clastic – cemented fragments Carbonates – cemented shell fragments Chemical – precipitated from water Composition (Minerals): calcite, dolomite, quartz, halite

Metamorphic Rocks Page 32 Rocks which form when preexisting rocks have been changed as a result of increases in temperature and or pressure without melting

06_17.jpg Marble Limestone Contact Metamorphism of Limestone Page 35