Worksheet #10: Martian Geology
GLG 101 Fall 2021
Name __________________________________________
Date __________________________________________
Making Observations of THEMIS Images
There are many images available of Mars. Over the past 30 years, NASA has sent landers, rovers and orbiters to image the surface of Mars. This part of the project will focus on images that have been taken from orbit. The Mars Odyssey spacecraft has been orbiting Mars since 2001. One of the tools it uses to take images of Mars is ASU’s Thermal Emission Imaging System (THEMIS). These images of Mars show great detail of many of the geologic features seen on the surface of Mars from orbit. In this exercise, you will look at THEMIS images and log specific information about each image you observe. Here’s what to do:
Go to the http://themis.asu.edu/topic website:
Click on a topic related to a type of geologic feature (i.e., NOT art, color, or landing sites — although those are fun to check out!) For Example:
Click on any of the thumbnails to see a THEMIS image of Mars related to your selected topic.
(Each of the small squares is a thumbnail.)
Martian Geology – Part 2 (cont’d)
Once you select a thumbnail a new
window will open showing you a THEMIS
image. You can get an enlarged view of the
image by clicking on the image.
Log the information on the observation table. Make observations of a minimum of 4 images. The information you will fill in is:
Type of Feature(s) Observed: Name the specific surface/geologic features you can see in each image. For some images you may be able to identify more than 1 surface feature. If you find the same surface feature in multiple images, be sure to include that same feature in your table multiple times. This will help you remember how a particular feature looks the same (or different) in multiple images – very valuable information! To help you correctly name features, use the Feature Identification Charts.
Sketch the Feature(s): Make a sketch or drawing of each feature you observed
Description of Feature(s): Write down a description of each feature you see and include any information you find especially interesting about the feature.
Here’s an example of how to fill out the table:
Name of Feature(s) Observed
Sketch of Feature(s) Observed
Description of Feature(s) Observed
Channel with craters
channel
craters
-Channel does not seem very
wide
-Channel branches off in places
-Small craters both on the
outside and inside of channel
Name _________________________________
Martian Geology – Part 2
Making Observations of THEMIS Images
Name of Feature(s) Observed
Sketch of Feature(s) Observed
Description of Feature(s) Observed
C. Hardgrove/J. G. O’Rourke 1 Arizona State University
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