Jeszcze raz o strukturach kolistych: identyfikacja, interpretacja oraz aspekty praktyczne

Abstract

ONCE MORE ON RING STRUCTURES; THEIR IDENTIFICATION, INTERPRETATION, AND PRACTICAL ASPECTS Summary The paper deals with the question of forms interpreted as isometric or similar (circular, elliptical, oval, polygonal, etc.) in remote sensing and analyses of terrain models. The forms may represent reflections of various geological structures. The problems connected with identification and geological verification of such structures and their potential economic significance are discussed. On that basis there is analysed the question of a meteorite scar recently described from the vicinities of Jelenia Góra by L. Antonowicz (1983). The analysis of satellite photos, geological structure, and distribution of mineral deposits in this part of the Sudety Mts shows that, in contrary to views presented by some authors, model methods of identification of ring structures untraceable by other techniques (including remote sensing), are questionable. In the light of remote sensing analysis and its verification with reference to geological data, the ring structure traced in plastic model of the Jelenia Góra area appears to be shaped by sets of differently oriented more or less rectilinear photolineaments correlable with various structural directions well established in this region. There are no data which would support the hypothesis that the directions may be treated as related to an impact of cosmic body and processes datable at the "moon" stage in development of the Earth crust.