GEY1112_L08_Fossilization_JElyWasinger

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Front Range Community College *

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1112

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Geology

Date

Dec 6, 2023

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docx

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7

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GEY1112 Name: Jay Ely-Wasinger Date: October 17, 2023 Class/section: GEY1112-C11 Instructor: Kristin Quadracci Lab Partner(s): Doggos (Read, there totally is dog hair in my casts and probably the molds too, it’s everywhere!) Lab 8 - Fossilization Original, completed Lab Notebook pages for the following are included in this Lab submission: I. Pre-lab questions II. Experiment 1 Includes: Legible photos or scans (with name card) of step 10 (one each pressing shell into sand and soil, for a total of two photos) Legible photos or scans (with name card) per step 19 Fossilization
Please note: for any questions that require additional research, consider using Google Scholar instead of Google. Also, any information taken/used from a source should be properly cited. PRE-LAB QUESTIONS 1. Describe three methods of soft tissue preservation. Soft tissues can be preserved by carbonization-- organisms are trapped in a sudden event and fossilized, cryo-fossilization, where an organism is exposed to deep freezing temperatures to preserve the soft tissues, or entrapment, where an organism becomes fossilized in a substance like tree sap. 2. What is the difference between a trace fossil and a mold? Trace fossils are essentially evidence of organisms that are tapped in time, such as fossil burrows, while a mold is a fossilized impression such as the footsteps buried in sediment at Dinosaur Ridge. 3. In what types of environments are body fossils most likely to occur? Why is this? Body fossils are most likely to occur in places like river beds and marine environments because these types of environments allow for rapid burial to preserve the fossil. Fossilization
EXPERIMENT 1: METHODS AND ENVIRONMENTS OF FOSSILIZATION Data Sheet Table 1. Shell Measurements Measurement Original Shell (cm) Plaster Shell in Sand (cm) Plaster Shell in Soil (cm) Plaster Shell in Play-doh ® (cm) Length 3.6 cm 3.8 cm 3.9 cm 3.5 cm Width 2.7 cm 3.5 cm 3.1 cm 2,7 cm Depth 1.1 cm 1.5 cm 1.4 cm 1.0 cm Table 2. Plaster Shell Observations Sand Potting soil Play-doh ® Observations No real shape, kind of just a lump where the shell imprinted in the sand, but it caved in on itself quickly Better than the sand, but the shape itself is very lumpy due to the texture of the soil. Still able to see some ridging from the shell, but very muted. Perfect little shell impression just a tiny bit smaller than the shell, 10/10 good job for this guy. Fossilization
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