(Geology)an irregular surface or seam within a limestone or other sedimentary rock, characterized by irregular interlocking pegs and sockets around 1 cm in depth and a concentration of insoluble minerals (地质)缝合线,缝合面 ■a grooved peg forming part of such a seam (构成缝合线一部分的)石笔杆
语源
mid 19th cent.: from Greek stulos 'column' + -lite