Book of discoveries · 170–171
Connecting valleys
Zoom with the mouse wheel inside the image or use the buttons. Drag the enlarged image with the hand cursor; swipe to move on a touchscreen.
Enter the Strahler stream-order values in the unnamed valley networks on the map. These indicate how complex the networks are. Outline ancient lakes, craters into which valleys lead, with a dashed purple line.
Your observations
Your notes are saved in this browser.