Commune: Zbójno (pow. golubsko-dobrzyński, woj. kujawsko-pomorskie)
Framework element or context represented:
Pleistocene ice-sheet landforms.
Primary geological/geomorphological interest:
Landscape of the drummlin field.
Comparative assessment justification:
The Zbójno drumlin field is an outstanding landform. It is a best example of the typical drumlin landscape in Poland.
Protection status and accessibility:
The site should be protected of the landscape category. It offers a beautiful view, high scientific values and good sightseeing accessibility.
Character of site: Glacial landform.
Area: 1200 ha
Altitude: 75 - 115 m a.s.l.
Discipline: Geomorphology, Stratigraphy of Quaternary, Tectonics
Process Age: Quaternary, *all periods
Bedrock Age: Quaternary, *all periods
Description of primary interest:
The Zbojno drumlin field is situated within the extent of the youngest, Vistulian (Weichselian) Glaciation and is the largest in the Dobrzyń Moraine Plateau. It is located in a vast (17 x 6.5 km) depression on the moraine plateau, in hinterland of the Chrostkowo end moraines (of the Kuiavian Subphase, Vistulian Glaciation). The drumlin field occurs at 8-40 m below the surrounding plateau (104-115 m a.s.l.). In the northern part of the area, three drumlinization levels are distinguished: the lower one at 75-81 m a.s.l., the middle complex — 10 m high here. Varying azimuths of morphological axes, shapes and morphometric parameters but also a complex geological structure are typical of the drumlins in Zbójno. Glacitectonic-depositional, glacideformation-depositional and glacioerosive-depositional drumlins predominate. In the vicinity of Zbójenko their cores contain deformed glacifluvial or glacilacustrine sediments, mantled with a deformation-depositional till cover. Glacial sediments form one to two or three sedimentary till beds that belong to one or two different glacial advances.
BER A. 1999–Preliminary list of the Quaternary geosites in Northern and Central Poland, their age and geological position. Pol. Geol. Inst., Spec. Papers, 2: 77-85 BER A. 2001–Ważne czwartorzędowe stanowiska geologiczne Polski północnej i środkowej (Polish only). In: W trosce o Ziemię. Księga ku czci Prof. S. Kozłowskiego: 224-239. KUL Lublin. LIBERACKI M. 1961–Drumlins near Zbójno. IVth INQUA. Intern. Congr. Guide-Book of Excursion. Part 1. North Poland, 115-117. OLSZEWSKI A. 1995–Zbojno drumlin field: morphology and structure of drumlins. XIV INQUA. Intern. Congr., Quaternary field trips in Central Europe, 1-210.