1) Rigg was used in several ways for land, presumably meaning ‘ridge’ initially.
1735 six riggs or parcells of ground lying in the middle of a close called Bell-close, Barton St Cuthbert
1751 ordered to turn her out onto the rigg or common, Hemsworth. The term rigg and furrow is more commonly associated with ploughed land: 1590 the lands lying in Medydall and the cownne which are fur and ryg are growne out of knowledge by name by reason they were imployd to an ox pastur, Kirby Underdale
1629 It is easelie to be discovered that their is rigge and furrow wheare the hedge standeth, Scriven. However, it was used in Colsterdale of coal seams, possibly a reference to the undulations of the strata: 1705 the seam of coales 14, 15 or 16 inches high and goeth much Rigg and Furrow.