Landforms processes | Geography homework help

1. What is this (N 34.64914 W 111.75221) karst landform, how did it form, and what is the elevation difference between the water in this landform and the stream immediately to the east?

a. This landform is a collapse doline formed by the dissolution of rock (limestone) in a cavern. Then, when the cavern ceiling collapsed this sinkhole formed. The elevation of the river to the east is a few meters lower than the lake. b. This landform is a sinkhole formed by faulting dropping down the basin. The river to the east is a few meters lower than the lake in the sinkhole. c. This landform is a blind valley formed by fluvial processes eroding the depressions, and the river to the east is about 10 meters higher than the lake surface. d. This landform is a caldera formed by the collapse of the volcanic basalt lava upon evaluation of the lava. The current lake surface is the same elevation as the river to the east. 1 points