Value C+. An individual plat of the Township & Range (1820s-1850s) plat map collection for the New Madrid study area in Missouri and Arkansas. It is a separate entry in the Compendium because of a unique mapped feature, also noted in the field notes. In a location that today is in a cotton field just north of Big Oak Tree State Park, Missouri (~23 km NE of New Madrid), the surveyor, H.W. Molder, noted "an earthquake crack bears SW & NW. Cross said crack being about 48 inches deep." On the plat, however, the crack is drawn nearly east-west, perhaps bearing ENE at its eastern end. It is about 0.6 km long as drawn. Today, there is a definite "crease" in the field’s drainage that is approximately the right location, length and orientation to possibly represent the remnant trace of the 1811-12 earthquake fissure. See also Suter (Map, 1874) and Long (Map, 1822a,b) for other identified earthquake features on 19th century maps.