Lab Report on Relative Dating of Rocks Using Stratigraphicc
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Lab Report on Relative Dating of Rocks Using Stratigraphic
Introduction and Goals: The goal of this lab is to study and apply relative dating principles to rocks, fossils, and geologic events. The history and concepts of stratigraphy will be addressed, as well as the use of fossils for relative
dating. You’ll learn about the geologic timescale, how to calculate relative ages, and how geologists date events in Earth history using various approaches. You’ll also gain some hands-on experience with the principles and practices.
The Lab is available in the files below.
Laboratory for Physical Geology 111
Stratigraphic Principles for Relative Dating of Rocks
I. Introduction and Goals:
The goal of this lab is to learn about relative dating and how to apply it to rocks, fossils, and geologic events. The history and concepts of stratigraphy will be addressed, as well as the use of fossils for relative dating. You’ll learn about the geologic timescale, how to calculate relative ages, and how geologists date events in Earth history using various approaches. You’ll also gain some hands-on experience with the principles and practices.
II. Becoming Familiar with the Six Principles of Stratigraphy:
A. Identify the seven basic physical stratigraphic laws:
Definition of the Stratigraphic Law1) Superposition
3) Inclusion
4) Fossil Succession is a term that refers to the succession of fossils.5) Continuity on the Sides
6) Horizontality that is unique
7) Unconformity B. Unconformities are gaps in the time-rock record when non-deposition and/or erosion occurred for a long length of time between deposition periods. They usually manifest themselves as visible uneven surfacesbetween two sets or groups of rock pieces, known as formations. Other geologic events such as tilting, folding, faulting, intrusion, and uplift can also be recorded by an unconformity. As a result, unconformities are useful for
determining the age of rocks. The three types of stratigraphic unconformities are listed and defined as follows: Definition of the Unconformity Type
III. Using Stratigraphic Order to Determine Relative Ages of Rocks and Geologic Events Directions: Fill in the blanks with your study and appraisal of the two geologic cross-sections provided below. Do the following for eachgeologic cross-section:
1. Calculate the ages of the rock bodies and other geologic features/events such as tilting, uplift, faulting, and erosional unconformities.
2. In the column of blanks, write down the letters from oldest (bottom of the list) to youngest (top of the list) in chronological order the sequence of geologic events (each one is identified with a letter). You must also specify which stratigraphic legislation was utilized to place each dated event in its relevant time frame for each dated event. The stratigraphic rules are abbreviated as SP = superposition, IN = inclusions, CC = cross-cutting, and UN =
unconformity.
3. Identify and label any lettered unconformities in each cross-section (by kind).
Lab Report on Relative Dating of Rocks Using Stratigraphic
RUBRIC
Excellent Quality
95-100%
Introduction 45-41 points
The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.
Literature Support
91-84 points
The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.
Methodology
58-53 points
Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met.
Average Score
50-85%
40-38 points
More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided.
83-76 points
Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration.
52-49 points
Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met.
Poor Quality
0-45%
37-1 points
The background and/or significance are missing. No search history information is provided.
75-1 points
Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration.
48-1 points
There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met
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Lab Report on Relative Dating of Rocks Using Stratigraphic