Haloze* is the name of a hilly area lying between the river Dravinja, Boč — Macelj mountain ridge and the Vinica Hills in the east.From the geomorphological point of view there is a difference betweenthe western and the eastern part of Haloze. Upper Haloze (i. e. thewestern part) are characterised by narrow bottoms of the valleys, bysteep slopes, by sharp ridges and finally, by considerable heights, bothrelative and absolute. Older erosion levels have hardly been preserved.In Lower Haloze, east of Rogatnica brook, the valleys are much broaderand the slopes less inclined; the ridges are smoother and the peaks arerounded. Ali the relief is much less bold than in Upper Haloze and theerosion levels are quite well preserved. Lower Haloze are rather a hillland, while Upper Haloze show more mountainous characteristics. In Lower Haloze the valleys are comparatively wide. The inclineof the longitudinal profiles of the brooks is small (about 3 °/oo). Theassymetric drainage pattern of the brooks is well marked in LowerHaloze. The tributaries on the left side are longer. Eastern slopes aretherefore much steeper than the western, which are also much moredissected by erosion. The divides are thus placed more to the west,except in the south, where they are in a normal position. In places,especially between Tajna and Rogatnica brooks, river capture on theright side of the tributaries could be expected. The left tributaries ofbrooks flowing towards the Drava river have cut back their courses somuch, that the divide runs on the ridges quite close to that river.In Upper Haloze the bottoms of the valleys are narrow. The inclineof the longitudinal profile of the brooks is more than 10 %o. Drainagepattern is more symetrical, but even here local devides tend to moveto the western side. Furthermore, it is significant that the left tributaries do not advance towards Dravinja as they do advance towards Drava in Lower Haloze.The origin of the assymetrical hydrographic network lies in thetilting of the whole tectonic unit in the eastern and southeastern direction. The main streams of Haloze have thus moved towards the east, whereas their left tributaries and valleys became longer and longer.The headward erosion of the left tributaries has also contributed tothe formation of an assymetrical hydrographic network. Their localbase level has been lowered because of the downcutting along mainbrooks. Further consequences of the headward erosion are also theriver captures which have probably occured. In Upper Haloze the asymetry'is less pronounced because of the greater heights. The streams cut deep valleys and the devides between them remained high andbroad. The headward erosion of the streams in Haloze is not strong. Therefore, the tributaries of Bednja on the southern side, in the area of Ravna gora, have cut their valleys far towards the north. Only in thewestern parts, towards Sotla river, the divide stili runs on the line ofthe mam peaks and ridges of Haloze. Small volume of the water in thestreams had also an influence on the general line of the divide. Thesame is true for the character of the mountain barrier in the southernpart. The streams of Haloze flow parallel to the north and there are notmany of them. Consequently their tributaries have ample space todevelop, especially those on the left side. On the whole, the relief issomewhat discontinuous and uneven as far as the heights are concerned. This fact is most marked in Upper Haloze.Upper Haloze are highest in the middle, where they rise to a heightof over 500 m, in Jelovec even up to 620 m. To the south of the highestpart lies a belt of lower terrain at the height of about 400 m. In Halozethe relative heights are quite considerale, as they reach 300 m in placesand even more. In Lower Haloze the heights are considerably lower andthey rise to over 400 m or even up to 500 m above sealevel only in thesouthern belt. Whereas in Upper Haloze the highest elevations lie inthe central belt, the elevations in Lower Haloze rise steadily from thenorth to the south. Relative heights in Lower Haloze are 200 to 300metres.A particularly important role in the evolution of the landform,which took plače during the late pliocene period, was played by thehydrographic network and by the composition of the rocks, whichdiffers. The character of the erosion levels in Haloze varies considerably.— In Lower Haloze the rests of the older erosion levels arecomparatively well preserved. In Upper Haloze, however, they aresmall and more deformed. There are no quite flat hill-top surfaces;there is rather a series of levels of rounded peaks and short ridges. Here,no erosion levels are widely devoloped and dominating, as it is the časein Lower Haloze. There, the evolution of landforms was rather different. In Lower Haloze the erosion levels have been better preserved because the downcutting and the denudation have been less strong thanin Upper Haloze where greater heights and less dense hydrographicnetwork have made downcutting rather than the lateral erosion moreefficient. These facts are responsible for different landforms in Upperand in Lower Haloze, and most of ali for the character of the remnantsof the erosion levels. Six erosion levels can be discerned in Haloze. Apart from thehighest one, ali have been formed in the late pliocene period. Thehighest level is at the height of 600—620 m, but it is limited to isolated spots. The most widely spread and most characteristic levels are those in the heights of 300—320 m, 340—360 m, 400—420 m and 440—460 m.The 300—320 level is prevailing in Lower Haloze between Rogatnicaand the Plain of Varaždin. In the lower lying parts in Lower Halozeappear only two terraces: a terrace. at the height of 260—280 m and thepleistocene terrace along the lower courses of Rogatnica and Tajna.This area is the first morphological unit of Haloze. The erosion levelat the height of about 360 mm represents a transitional belt betweenLower and Upper Haloze. This broad belt extends from the southernmountain rim of Lower Haloze in the northwestern direction to UpperHaloze. This belt can be considered as the second morphological unitof Haloze. The prevailing erosion level in Upper Haloze is that at theheight of about 460 m. This is the elevation of the high ridges in Haloze.The characteristic and most common level in Upper Haloze is that atthe height of 400—420 m. In two belts, one to the south and the otherto the north of even a higher part of Haloze, they encircle the 460 mlevel and the other two levels appearing at the height of about 500—540 m and 600—620 m. The latter two levels appear only in the centralpart of Upper Haloze. The other high erosion levels appear, however,also to the south of Lower Haloze. The area of the higher levels, especially in Upper Haloze, represents the third morphological unit of Haloze.