Our week of featuring the photographs of Al Capizzo concludes with this image from Cattail Falls in Big Bend National Park.
Al tells us this about the photograph: "In the photo you can see grayer, darker rock on left and lighter rocks on the right. The darker rock is a much harder rock than the lighter rock. It is essentially "bedrock" which was forced up through the softer rock and is what we see as the mountain tops, sticking up today. The creek is following a fault line between the two types of rock, and is there because this was a place it could start wearing a channel through the softer rock. You do see some grayer rocks on the right of the creek, but those are just boulders and rock that fell from the higher levels and ended up here. Of course all this took place before I was born, so I'm just passing along what I've heard!"
We'd like to tip our hat again, and thank Al for sharing his photos with us all week. Thanks, Al!