n'ime ndagwurugwu nke osimiri Pilica na Tomaszów Mazowiecki enwere mmiri karst nke mmiri nwere nnu calcium, nke bụ ihe nchekwa na Niebieskie Źródła Nature Reserve na Sulejów Landscape Park. Isi mmalite nke aha nchekwa ahụ bụ Niebieskie Źródła, nke pụtara Blue Springs, na-enye eziokwu ahụ bụ na ebili mmiri na-ekpuchi mmiri na mmiri nke Europe; mbupu nke ọka na ngwaahịa ugbo ndị ọzọ na-agbada Vistula na Gdańsk wee gaa n'ihu n'akụkụ ndị ọzọ nke Europe ghọrọ ihe dị mkpa. N'ime ndagwurugwu nke osimiri Pilica na Tomaszów Mazowiecki enwere mmiri karst nke mmiri nwere nnu calcium, nke bụ ihe nchebe na Niebieskie Źródła Nature Reserve na Sulejów Landscape Park. Isi mmalite nke aha nchekwa ahụ bụ Niebieskie Źródła, nke pụtara Blue Springs, na-abịa site n'eziokwu na ebili mmiri na-ekpuchi mmiri na mmiri na-acha uhie uhie na mmiri nke Europe; mbupu nke ọka na ngwaahịa ugbo ndị ọzọ gbadara na Vistula
ụgbọ mmiri