20231019154143341

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Liberty University *

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ALGEBRA

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Geology

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Dec 6, 2023

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pdf

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4

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SEDIMENTARY ROCK IDENTIFICATION LAB T L A3 WEgR Name: !fif}flw{fi[‘, faraeys pate: L0/ t%/ 7 Objective To identify sedimentary rocks based on grain size, texture, and composition Materials + Clastic/Chemical Sedimentary Rock Charts « Mohs Hardness Scale (Optional, used in previous lab) Purpose (5 pts) Write 1~2 sentences stating the purpose of this lab. What do you expect to learn? What do you want the outcome to be? Gere the P hotas ot Sed meafee Tocks, PP dent €y o ‘(’”é’%‘( acter s el correaty e ”/F’“c‘\/‘ the rock, Hypothesis (5 pts) Write your hypothesis for this lab. It should be 1 sentence and be an if/then statement. (Remember this is your educated guess as to what will happen in this lab.) - } R B P [ Py - o, e S a = (M L. Py i ‘o (o yeotl ¥ et Ty Y /‘f*w'm; O the glven ypcics vy - ; » o G v Yool s Fhon 4 be obie Fe m’éfi,’/’ffi’tfi’}’ *éy rocl, Procedure 1. Read through all of the steps in the procedure as well as the Data section. Then complete the Purpose and Hypothesis sections. 2. Using the information provided in the Dato table and the Clastic and Chemical Sedimentary Rock Chart complete the Data table and name each sedimentary rock. 3. Complete the Observations, Analysis and Conclusion, and Application sections before submitting the lab assignment.
Data (60 pts) You may want to refer to the Mohs Hardness scale chart from the Mineral Identification Lab to help you decipher the composition based on hardness. You will also want to keep in mind that calcite reacts with hydrochloric acid. (2 pts per blank = 60 pts total} (/"’Leml el Organic/ Biologic éétemtkc el cl ohtee clestic Clebtic : Med: v fi//@/ Sren, e Fine to (cle re. coarse Crystalline Chelis/ Coled Coytde, cemented Sheld Fine to . Calditeand some - gypoiy coarse ~ shell and skeleton | Crystalline f fragments cheats/ Codere degsi't %mw red [ ‘mebtone 6@1@((5 Very Fine §M e | | (<1/256 ? ; mm) | | | i | ! i j COUI i |
C Zu{] fi\ ¢ Very e 7 Silica {Quartz) Gritsten e Clobtlc ~' grevel Grececn Biologic s Altered Plant Fragments Data Table 1 Observations (10 pts) What do you notice about the differences between clastic, chemical, and organic sedimentary rocks from the samples you looked at? State your answer in 2-3 sentences. [ e T fevre hes the 4 Sees s b ofvwees; A BNCA . IL“’C}/ 6%3”*{5‘”?’7 ceh ; (f!{'} e el fi"r’fl'(l’_é fi? é{? L‘/&éa’? . Analysis & Conclusion {10 pts) Which characteristic was most helpful in identifying the rock (texture, grain size, composition)? How could this lab exercise be improved? s there any additional information that would have been helpful to you in identifying the rock samples? Did you struggle to identify any of the samples and if so, why? State your answer to these questions in complete sentences. e Db f /Am;%/f'[:«fiw e g {/3’&‘5 poran ¢ 7y fx,%#m?; o . dhere were o Few mMp#E cotegoris il Vel Zzw’ 2 bee heconht e i FALe 4 eapier Application (10 pts) Imagine you are walking in the woods and you come across a gray rock composed of a number of different fossilized organisms such as crinoids, trilobites, and brachiopods. You pour some hydrochloric acid on the rock and notice that it reacts to the acid. Based on this information, what is the name of this
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rock and what does it tell you about the environment in which it formed? State your answer in complete sentences. ?’7’5»’ The rock wouwld most [ikely be T omesk lkpl . Eemad ar 4 Cuereas 0F e fptl. v s syl e S i wo ke it restfed like He becouse pe Hie 056 {2ttt ¢ cod e e, e Deccnse Hogrer Tern g,