Instructions. Complete these tasks only when instructions in the lab manual tell you to.

1. Use "stroke" button to pick a text color (eg blue).
2. Use "text" button to add your name to the top left corner (follow directions under image when "text" button is selected).
3. Use "text" button to add abbreviations for Location Ages in the boxes. Two are done for you as examples.
4. Use "stroke" button to pick a different color (eg red).
5. Use "pencil" button to draw your interpretation of boundaries between named ages.
   1. These are "chronostratigraphic lines".
   2. They should span all three geological columns indicating the boundaries between rocks of distinct ages, for example the boundary between Ordovician and Silurian rocks.
6. For Specimen #47: Also mark one or more locations with an "X" and label it (or them) with "S47" to indicate where in these geological sections you think specimen #47 could have fallen from.
7. Save result as you did for Lab 1:
   1. Click "Export as PNG button (under tools). This puts your result in a new browser tab.
   2. Use your browser to "Save as" or "Save Image As".
   3. PLEASE name this file using your name: eg. "JaneDoe.png". Do NOT change the "png" part.
8. Finally, upload your image to the Course CONNECT site using the link "Lab 3 step 4; save your sketch here".

Once you have saved your image WITH FILE NAME AS INSTRUCTED ABOVE, you are done!

Tips:

• Use the "Clear" button to start again.
• Use the "Eraser" button to remove portions of work you have done.
• Hover your mouse over a tool for tool-tips.
• If you zoom out, keyboard arrows will pan.

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