Dust coverage

1. Open JMARS

2. Set zoom to 4

3. Click Add New Layer (the + icon).

4. In “search layers” type in: “TES Dust Cover Index”. Click on the name.

5. Double click on the name in the layers manager (left black column)

6. In upper right corner click on the white circle with the “I” for information about the layer to learn about the colors. OR Click on the eye icon in the top menu. Click OK. All numeric information from your layers will be shown next to the curse. Note: Thick dust can hide the materials beneath the surface. Look for: darker purple regions → higher dust coverage

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Basalt Rich Surfaces

1. Open JMARS

2. Set zoom to 4

3. Click Add New Layer (the + icon).

4. In “search layers” type in: “TES Basalt Abundance”. Click on the name.

5. Double click on the name in the layers manager (left black column)

6. In upper right corner click on the white circle with the “I” for information about the layer to learn about the colors. OR Click on the eye icon in the top menu. Click OK. All numeric information from your layers will be shown next to the curser. Note: Basalt-rich regions may represent volcanic surfaces that have been less altered by water. Look for: bluer regions → higher basalt abundance

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Water-Altered Minerals

Some surfaces show signs that water changed them—or was once there and disappeared.

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1. Open JMARS

2. Set zoom to 4

3. Click Add New Layer (the + icon).

4. In “search layers” type in: “OMEGA Hydrated Mineral Map”. Click on the name.

5. Add a second layer: Click add new layer. In “search layers” type in: 2010 Chloride Survey. Click on the name.

6. Double click on the names in the layer’s manager. Green dots have sediment with hydrated minerals. White dots are chloride sediment. Note Hydrated minerals may indicate places where water once changed surface materials. Look for: green circles → hydrated mineral detections

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EXAMPLE: This 14 seconds video start with the Explore Mars layer then progressively shows the dust, basalt, and hydrated minerals layers. Pause enabled. See "A place to begin" for exploration.