5 ms·
...the spring is acting like a moving sinkhole, with mud about 40 feet (12 m) deep. As it moves through the region's mudstone (a soft, sedimentary rock), it lea
by HillaryBriss 8y ago
...the spring is acting like a moving sinkhole, with mud about 40 feet (12 m) deep. As it moves through the region's mudstone (a soft, sedimentary rock), it leaves behind a sunken trail...