• Journal of The Geomorphological Association of Korea
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• v.18 no.1
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• pp.73-83
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• 2011

The aim of this paper is to explore the concept, backgrounds of an geopark's origin, and activity of geopark in geography, and to debate the Korean name of the geopark (or geological park) in controversial. Geopark starts with the collaboration between International Geographical Union(IGU) and International Union of Geological Sciences(IUGS). However, the intention which is establishing the law of geopark (or geological park) within a specific academic realm in Korea, would be wrong. The reason for this argument is that activities in Geopark have aspects of the conservation of natural heritage as well as geomorphological and geological one. Therefore, geopark should not be focused upon a specific academic realm. The geological scope alone seems to be limited. That is why "GEO" is more than geology. "GEO" involves geographical and geomorphological issues as well. Within this context, in Korea where is in the quickening period of geopark, the discussion and agreement with the Korean name of geopark are absolutely imperative.

• The Korean Journal of Petroleum Geology
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• v.5 no.1_2 s.6
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• pp.36-47
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• 1997

This study presents multi-variable sequence model for a broader application of sequence concept proposed by Exxon group. The concept of the multi-variable model is based on the fact that internal organization and boundary type of the sequences are determined by three varying factors including 3rd-order cycles of eustasy, and tectonic movement and sediment influx with 2nd-order changes. Instead of Exxon group's systems tracts, this model adopts parasequence sets as the fundamental building blocks of the sequence, because they are descriptive stratigraphic units simply defined by internal stacking pattern, reflecting interactions of accommodation and sediment influx. Seven sequence types which vary in number and type of internal parasequence sets are formulated as associations of four types of accommodation development and three grades of sediment influx. In the southwestern margin of Ulleung Basin, the multi-variable sequence analysis of shelf-slope sequence shows systematic changes in stratal patterns and the numbs, of constituent parasequence sets (i.e. sequence type). These changes are interpreted to reflect temporal and spatial changes in type and rate of tectonic movement and sediment influx, as a result of back-arc opening and closing. During the back-arc opening, rapid subsidence, continuous rise of relative sea level, and high sediment influx gave rise to sequences dominantly of single progradational parasequence set. In the early stage of back-arc closing accompanied by local contractional deformation, different types of sequences contemporaneously formed depending on the spatial changes in tectonically-controlled accommodation and influx rates. During the subsequent slow back-arc subsidence, rise-dominated relative sea-level cycle was coupled with moderate to high sedimentation rate to have resulted in sequences consisting of $2~3$ parasequence sets.