21. Purcell Knob is notable for exposure of the Loudoun Formation in its antiformal syncline . 22. The rocks of Hertfordshire belong to the great shallow syncline known as the London Basin. 23. These are the White Deer Anticline, the Lackawanna Syncline , and the Milton Anticline. 24. The syncline is canoe-shaped, with a length of and a width of. 25. To the north is the Micheldever Syncline . 26. Key folds in the basin for hydrocarbon exploration include the Nuevo Mundo and Guaduas syncline . 27. Rossbach and Dennison ( 1994 ) extended the Foreknobs into the Catawba syncline of southwestern Virginia. 28. This member forms small hills within the Great Unconformity on either side of the Chuar syncline . 29. To the south-west across the River Test is the similar Alderbury-Mottisfont Syncline . 30. A syncline surrounds the center, where the axis forms a complete circle approximately two miles across.
