ABSTRACT: This new type of diagram is called a vector diagram because it is based on vectoral dimensions. In the beds of the Demirözü and Köse area south west of Bayburt nine formations have been discriminated. Only two formations, Sırataşlar and Kızılyar have been used in drawing the rose (Kg. 3 and 4), contour (Fig, 5) and vector (Fig. 6) diagrams. In order to draw a vector diagram, first concentric circles that have the radii r/9, 2r/9,... nr/n and r/4, 2r/4...nr/n are drawn. Then the East-West and North-South axes are added and the adequate dip degrés and percentage are written on the East-West axis. The details of this drawing are illustrated in Fig. 6. Afterwards the vectors of the average dipandpercentage are calculated and are put in to their places (like in a1..a5 and c1...c5) the average dip and percentage are shown bysolid and broken lines on the effect lines Predominant strikes can be found by adding tha two percentage vectors that are on the same line but in converse direction. As is known, predominant strikes are perpendicular to the dipvectors (a1c1-a5c5). Vector diagrams are more accurate and easier to use than others. The main advantage of vector diagram is that it is possible to read boththe average dips and their strikes directly from only one diagram. Finally, with vector diagram it is not necessary to make extensive explanations of the tectonic positions of formations in geological theses and reports.