11. The source region lies in the Franconian Switzerland-Veldenstein Forest Nature Park and belongs geologically to the Brown Jura. 12. The nearest large centres of population in the source region are Helmstedt, about northwest, and Magdeburg around east. 13. Other ancient forest-like cells of natural woodland may be found in the source region of the ( Wies )-Obersteinbach. 14. These external wave modes cannot transport wave energy, and their amplitudes decrease exponentially with height outside their source regions . 15. The profiles suggest that there may be two local source regions , the first centered near and the second near. 16. Once an air mass moves away from its source region , underlying vegetation and water bodies can quickly modify its character. 17. The crust above the Jotabeche ignimbrite source region was thick enough to permit the stability of garnet in said source region . 18. Continental Polar air masses ( cP ) are air masses that are cold and dry due to their continental source region . 19. The crust above the Jotabeche ignimbrite source region was thick enough to permit the stability of garnet in said source region. 20. The source region of the �rtze and its several source bogs lie on the terrain of the Ise to the east.