Clear weather: 8 Â°C: 2 N: 60 % 08:00: Clear weather: 10 Â°C: 2 N: 62 % 11:00: Clear weather: 16 Â°C: 2 S: 47 % 14:00: Clear weather: 16 Â°C: 2 S: 51 % 17:00: Clear weather: 12 Â°C: 1 SW: 77 % 20:00: Clear weather: 11 Â°C: 1 NE: 59 % 23:00: Clear weather: 10 Â°C: 1 NE: 49 % Tuesday 09/01: 02:00: Clear weather: 10 Â°C: 1 NE: 43 % 05:00: Almost clear: 11 Â°C: 1 E: 43 % 08:00: Clear weather: 11 Â°C: 1 NW: 47 % 11:00: Clear weather: 16 Â°C: 2 S: 44 % 14:00: Clear weather: 16 Â°C: 2 S: 59 % 17:00: Clear weather: 12 Â°C: 1 SW: 81 % 20:00: Clear weather: 12 Â°C: 1 NE: 64 % 23:00: Clear weather: 11 Â°C: 2 NE: 55 % Wednesday 10/01: 02:00: Clear weather: 10 Â°C: 2 NE: 49 % 05:00
In cylindrica l folds the crest and trough lines are parallel. to the fold axis and to each other, but in conical folds the crest and trough lines are not. parallel. Crest and trough surfaces connect the crest and trough lines on successive. horizons.
A fold axis, âis the closest approximation to a straight line that when moved parallel to itself, generates the form of the fold.â (Davis and Reynolds, 1996 after Donath and Parker, 1964; Ramsay 1967).