• The Journal of the Petrological Society of Korea
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• v.19 no.1
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• pp.51-65
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• 2010

The Dongmakgol Tuff is a stratigraphic unit which is composed of voluminous ignimbrites in the Cheolwon basin. The ignimbrites belong to pumice-rich vitric tuffs that show eutaxitic to parataxitic fabrics from fiamme or pumice clasts. They are almost densely welded and strongly flattened, but often parallel aligned and stretched. Also they exhibit flow indicators such as flow lineations, imbrications, tensional cracks and boudins from their alignment and/or elongation, and lithic and pumice clasts show lateral grading in their average maximum diameter. Flow direction map from the lineations, asymmetric structures and lateral grading diagram indicate that the Dongmakgol Tuff has a source from its southwestern part near a boundary between southern Dongmakri and northern Gomunri, and is considered that the ignimbrites took emplacement processes of laminar flows during the final stage of flowage and the flow lineations are from the result of shear stress during that times.

• Economic and Environmental Geology
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• v.40 no.3 s.184
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• pp.319-330
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• 2007

The Muposan Tuff is a stratigraphic unit which is distinguished as a cooling unit in the volcanic rocks of the northeastern Kyeongsang Basin. The Muposan Tuff commonly belongs to tuff field according to the granulometric classification and to vitric tuffs according to the constituent classification. The tuffs are mostly densely to partially welded to include very flattened and sometimes stretched pumices and shards, and involve several flow indicator and lateral gradings in maximum diameter and content of their constituents. Movement pattern from flow lineation, lithic and pumice imbrications, asymmetric flow folds, and lateral gradings in maximum diameter and content of their constituents indicate that the Muposan Tuff had a source from the southeastern part.

• The Journal of the Petrological Society of Korea
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• v.19 no.4
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• pp.293-301
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• 2010

The Ipbong Andesite is a stratigraphic unit which is lain in the lowermost part of the Yucheon Group in the southeastern Yeongyang sbbasin. The Ipbong Andesite is lain on the Sinyangdong Formation and under the dacitic tuff, and consists in its lower andesitic tuffs and upper lavas. The andesitic lavas show some alignments of elongate vesicles filling with calcite amygdules and plagioclase microphenocrysts, and show rare imbrication of the microphenocrysts in vertical sections parallel to them. The flow directions which is measured from the flow indicators are laid along NNW-SSE trend in the eastern part and NNESSW in the southwestern part of the study area. Movement pattern from the flow lineations suggests that the Ipbong Andesite had a fanlike pattern by flowing southwards from the mid-northern part. Accordingly a small diorite stock in the mid-northern part area may probably be a source area of the Ipbong Andesite.

• The Korean Journal of Zoology
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• v.32 no.2
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• pp.84-92
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• 1989

The dermatoglyphic paffems of the hands and feet form during early fetal life and thereafter remain essentially unchanged. These traits are useful to study genetics and environmental factors that influence prenatal life and used in practice for personal identification and diagnosis of some diseases. The students of 112 male and 118 female were tested for the paffems of plantar regions. The most common patterns were open fields in the four interdigital areas and the frequency of the mirror pattern on them was 57.2%. For a-b, b-c and c-d ridge counts of the plantar interdigital areas sampled from 105 male and 109 female students, the nonsignificances were found between both sexes and between both feet.

• The Journal of the Petrological Society of Korea
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• v.26 no.2
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• pp.153-163
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• 2017

The Naeyeonsan Tuff is a stratigraphic unit which is distinguished as a cooling unit in the volcanic rocks of the northern Pohang. The Naeyeonsan Tuff, which is composed of crystals of plagioclase, quartz and hornblende, glasses of pumice and shard, and lithics of dacite, rhyolite, sandstone and shale, belongs to a lapilli tuff field according to the granulometric classification and to a vitric tuff field according to the constituent classification. The tuffs mostly develop welding foliations by dense welding and flatterning pumices and shards, and show several flow indicators by pyroclastic flowing. We can know a movement pattern from flow lineations and imbrications by pumices and lithics, and lateral gradings in isopleth map by average largest lithics and pumices in the Naeyeonsan Tuff, which indicate that the Naeyeonsan Tuff had a possible source area from the southeastern part.