Flattop Mountain, a Synclinal Mountain Small 83×320 Medium 166×640 Large 266×1024 Download Tiff Original 624×2400 | (149.9 KB) Description Section across the Livingston and Lewis ranges, with the Flattop Mountain, a synclinal mountain, and Chief Mountain, a remnant of an overthrust fault block. The strata are more complexly folded than is here shown. Keywords Flattop Mountain, synclinal mountain Galleries Geology Source: Amadeus W. Grabau A Textbook of Geology (Boston: D.C. Heath & Co., 1920) 599