This image shows the effects of Noah’s Flood cutting water gaps in the Susquenhanna River Basin, Pennsylvania, USA, very late in the Retreating stage.
Gaps in this area were examined by Ken Karle in an article in Journal of Creation [free pdf]. This is a sea-level-rise picture at 180m asl (red), 240m asl (orange) and 320m asl (yellow) of the Susquehanna River basin of Pennsylvania, USA. The large river whose channel is marked by red is the Susquehanna River.
The image shows very clearly how Blue Mountain, the long SW-NE trending ridge that transects the picture, could have acted as an impoundment, which was overtopped by receding waters through what are now the water gaps (marked with arrows). Closer inspection also reveals many water gaps in the basin itself.
Karle’s article is a fascinating one and you can use Google Earth and Google Maps, with the Google Earth filled-in contours, yourself, to visualize water gaps in the region. There are hundreds of gaps in the basin.
Karle’s article was first published in Journal of Creation. It’s a great periodical to keep you at the cutting edge. The cover of the latest issue is displayed above right, with a link where you can obtain your own subscription. (Here’s the link for you to subscribe. If you are not from the US, click “Stay here” if a message box appears.)