Well formed, sinuous, graded on both sides, eskers can be mistaken for man-made earthen structures, such as railroad embankments. Here is an example, nine-tenths (0.9) of a mile long substantial enough to direct the flow of Fall Creek. On entering the Malloryville esker bed the stream makes a right angle turn.
Here we are at the foot of the primary esker of Malloryville Preserve (it is marked as such on the information placard of this series first post). The slope to the right is the esker. A swamp lies to the right.
This video provides a better feeling for this esker.
Click me for better experience viewing the following video. To do this from WordPress Reader, you need to first click the title of this post to open a new page. Note the replay icon (an arrow circling counter-clockwise.