Still, and precisely because of this geological difficulties, we believe all sides could benefit from diplomatic negotiations.
The "information system on shallow geothermal energy in Baden-Württemberg (ISONG)" launched by the LGRB is a successful example: the online map does not only show water protection areas, but also warns of confined aquifers as well as geological difficulties.
Despite modernisation in the early 1960s, this final pit lapsed into unprofitability due to local geological difficulties and manpower shortages.
The widespread adoption of limited liability status began a trend towards a concentration of ownership, reducing some of the economic risks involved in coalmining: unstable coal prices, inflated acquisitions, geological difficulties, and large scale accidents.
However, due to local geological difficulties and manpower shortages output declined and the number of pits reduced from 30 at the beginning of the 20th century to 14 by the mid-thirties; the last two pits, Kilmersdon and Writhlington, closed in September 1973.
However, due to local geological difficulties and manpower shortages, decline soon took hold and the number of pits reduced from 30 at the beginning of the 20th century to 14 by the mid-thirties, 12 at nationalisation to create National Coal Board on 1 January 1947, 5 by 1959 and none after 1973.
Seven different factors could be identified in the scarcity debate: geological scarcity, technical difficulties in extracting the metals, the lack of substitutes, price variations, limited transport infrastructure, domestic unavailability and legal regulations.
The main difficulty raised by 3D geological modeling of sedimentary system is determining the geological genesis and geometrical boundaries of missing strata.
Well-testing operation in new fields is faced difficulties such as geological complex that requires advanced technology (Wiebe 1980), experienced personnel and longer durations for operations.
The authors conclude that, in fact, strike and dip are difficult geological concepts to teach, and the difficulty may lie in part with underdevelopment of students' "Euclidean conceptual system" (p. 81).
