JaLCDOI 10.18926/ESR/13847
タイトル(別表記) Geology of Holocene deposits in Mizushima Area, Okayama Prefecture, Japan
フルテキストURL EAR_13_1_15.pdf
著者 鈴木 茂之|
抄録 The study srea, Mizushima is occupied by polder and reclaimed land. The ground of this area is composed of the Holocene deposits below the surface. The deposits are mostly 10 to 20m in thickness and composed of 2 units, the B Unit and C&D Unit. The B Unit is composed of muddy sand with 2 to 3m in thickness. This unit is thought to be deposited in the mouth of paleoriver. The C&D Unit is composed of marine mud and sand with 10 to 15m in thickness. This unit is especially soft and will expand ground oscillations during an earthquake.
キーワード Holocene deposits Mizushima Area Ground oscillation
出版物タイトル Okayama University Earth Science Report
発行日 2006-03-31
13巻
1号
開始ページ 15
終了ページ 18
ISSN 1340-7414
言語 Japanese
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310562
JaLCDOI 10.18926/ESR/13869
タイトル(別表記) Relative sea-level changes of the Okayama Plain Area during the Holocene, Southwest Japan
フルテキストURL earth_science_reports_011_1_33.pdf
著者 鈴木 茂之|
抄録 Postglacial relative sea-level change of the Okayama Plain Area has been analyzed. Former sea-levels were recognized by using peat beds and marine organisms which are also available for 14C dating. Peat beds were rhought to be formed under a stable sea-level condition. 14C ages of the analyzed peat beds were seprated by 4 groups ; 30~18 ka BP, 11~8 ka BP, 6~4 ka BP and 3~2.5 ka BP, indicate 4 stable sea-level periods. 2 transgressive events (18~11 ka BP and 8~6 ka BP) and one regressive event (3.5?~3 ka BP) were also inferred.
キーワード sea-level change peat bed Holocene Okayama Plain
出版物タイトル Okayama University Earth Science Report
発行日 2004-12-31
11巻
1号
開始ページ 33
終了ページ 37
ISSN 1340-7414
言語 Japanese
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310268
JaLCDOI 10.18926/ESR/13870
タイトル(別表記) Paleoenvironmental Analyses of the Buried Peat Deposit during the mid-Holocene at the Desaki Coast in Tamano City, Okayama Prefecture, Weatern Japan
フルテキストURL earth_science_reports_011_1_39.pdf
著者 松下 まり子| 佐藤 裕司| 鈴木 茂之| 行基 幸一| 百原 新| 植田 弥生| 加藤 茂弘| 前田 保夫|
抄録 The buried peat deposit was foud in the sand beach on the Desaki coast (Tamano City, Okayama Prefecture), the northeastern coast of Seto Inland Sea. In this study, we performed sulfur and diatom analyses of the deposit. The results were used along with 14C dates and the eruption age (7300 cal BP) of Kikai-Akahoya tephra (K-Ab) to derive sedimentary environments of the deposit. K-Ah was detected just below the peat deposit. At the culmination of the Jomon transgression, the peat deposit had been formed in brackish environments of salt marsh for about 300 years. In order to reconstruct local paleovegetation, we analyzed pollen, wood and plant fossils in the deposit. The results show vegetational transition from a deciduous broadleaved forest mainly of Ouercus subgen. Lepidobalanus to Pinus forest. In spite of the Holocene thermal optimum, the vegetation dominated by Ouercus subgen. Cyclobanopsis was not recognized at the Desaki site, as has been shown in many other regions of regions of western Japan. Ouercus sect. Prinus was replaced by Ouercus sect. Aegilops as the dominant section of Ouercus subgen. Lepidobalanus, suggesting early establishment of traditional rural vegetation of 'Satoyama' in Japan. However, no evidence for human agency has been obtained from the mid-Holocene archaeological sites around the Desaki site. Thus it is more likely that this vegetational transition resulted from the succession caused by natural forces such as ecological disturbance and climatic and/or endemic situations rather than by cultural deforestation.
キーワード Desaki coast diatom remains Jomon transgression Kikai-Akahoya tephra mid-Holocene Paleoenvironment peat deposit plant fossils
出版物タイトル Okayama University Earth Science Report
発行日 2004-12-31
11巻
1号
開始ページ 39
終了ページ 47
ISSN 1340-7414
言語 Japanese
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310603
JaLCDOI 10.18926/ESR/13874
タイトル(別表記) Distributions and ages of the Paleogene deposits in the Kibi Plateau Area, and Paleogene paleogeography
フルテキストURL earth_science_reports_010_1_15.pdf
著者 田中 元| 鈴木 茂之| 宝谷 周| 山本 裕雄| 壇原 徹|
抄録 The "Kibi Plateau" forms a unique geomorphic province with the gently-sloping and stable continental feature. Gravel deposites called the "Mountain Gravels", are distributed sporadically in the Kibi Plateau, and have been considered Pliocene deposits. However, recent fission-track ages of the tuff beds intercalated in the deposits have indicated that the ago of deposits are Paleogen in the age. So far, fission-track ages (using zircon) of 61 to 65, 55, 37, 34 to 35 and 27 Ma are obtained. Remaining the belt-like distributions of the Paleogene gravelly valley-full deposits suggest that the Kibe Plateau has been keeping as a stable block, and repeated periods of incision followed by sedimentation of valley-fill deposits are occurred in the area during Paleogene period.
キーワード Kibi Plateau gravelly valley-fill deposites fission-track ages Paleogene palaeogeography
出版物タイトル Okayama University Earth Science Report
発行日 2003-12-20
10巻
1号
開始ページ 15
終了ページ 22
ISSN 1340-7414
言語 Japanese
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310517
JaLCDOI 10.18926/ESR/13875
タイトル(別表記) Depositional environments of the Katsuta Group, eastern Tsuyama Basin, Southwest Japan
フルテキストURL earth_science_reports_010_1_23.pdf
著者 山崎 良| 鈴木 茂之|
抄録 The Miocene Katauta Group of the Syohoku-cho area is subdivides into 6 members ; The Uetsuki Conglomerate Member, Nara Sandy Mudstone Member, Tai Gravelly Sandstone Member, Takatori Conglomerate Member, Ayabe Mudstone Member and Maruyama Mutstone Member from bottom to top. The unconformity between Miocene deposits and basement rocks in this area was traced to obtain geometry of the Miocene basin. Contour maps of the bases of the Miocene Yoshino Formation and Takakura Formation indicate paleo-topography. The obtained topography demonstrates a valley, which flowed to north-west, and a few islands and bays. It indicates that these Miocene successuions were deposited in the topography which resemble to the present Seto Inland.
キーワード Katsuta Group Tsuyama Basin Miocene geometry of basin paleoenvironmental chage
出版物タイトル Okayama University Earth Science Report
発行日 2003-12-20
10巻
1号
開始ページ 23
終了ページ 31
ISSN 1340-7414
言語 Japanese
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310475
著者 三上 禎次| 武蔵 野實| 鈴木 茂之|
発行日 2002-09-20
出版物タイトル Okayama University Earth Science Report
9巻
1号
資料タイプ 紀要論文
著者 藤原 貴生| 鈴木 茂之|
発行日 2002-09-20
出版物タイトル Okayama University Earth Science Report
9巻
1号
資料タイプ 紀要論文
著者 藤原 貴生| 田口 栄次| 鈴木 茂之|
発行日 2001-09-20
出版物タイトル Okayama University Earth Science Report
8巻
1号
資料タイプ 紀要論文
著者 水井 良暢| 橘 徹| 鈴木 茂之|
発行日 2001-09-20
出版物タイトル Okayama University Earth Science Report
8巻
1号
資料タイプ 紀要論文
著者 鈴木 茂之| 中澤 圭二| 田中 元|
発行日 2000-09-20
出版物タイトル Okayama University Earth Science Report
7巻
1号
資料タイプ 紀要論文
著者 藤原 貴生| 鈴木 茂之| 前田 保夫|
発行日 2000-09-20
出版物タイトル Okayama University Earth Science Report
7巻
1号
資料タイプ 紀要論文
著者 Yamagiwa Nobuo| 鈴木 茂之| Okimura Yuji|
発行日 2000-09-20
出版物タイトル Okayama University Earth Science Report
7巻
1号
資料タイプ 紀要論文
著者 鈴木 茂之| 行基 幸一|
発行日 1999-09-20
出版物タイトル Okayama University Earth Science Report
6巻
1号
資料タイプ 紀要論文
著者 鈴木 茂之| 宮脇 明子|
発行日 1998-09-20
出版物タイトル Okayama University Earth Science Report
5巻
1号
資料タイプ 紀要論文
著者 佐々木 甫| 鈴木 茂之|
発行日 1998-09-20
出版物タイトル Okayama University Earth Science Report
5巻
1号
資料タイプ 紀要論文
著者 宝谷 周| 鈴木 茂之| 田中 元| 山田 琢哉|
発行日 1997-09-20
出版物タイトル Okayama University Earth Science Report
4巻
1号
資料タイプ 紀要論文
著者 Daniel K. Asiedu| 鈴木 茂之| 柴田 次夫|
発行日 1996-09-20
出版物タイトル Okayama University Earth Science Report
3巻
1号
資料タイプ 紀要論文
著者 鈴木 茂之|
発行日 1996-09-20
出版物タイトル Okayama University Earth Science Report
3巻
1号
資料タイプ 紀要論文
著者 鈴木 茂之| 稲田 孝司|
発行日 1995-09-20
出版物タイトル Okayama University Earth Science Report
2巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/ESR/13844
タイトル(別表記) バングラディシュの更新世台地の地形と地質
フルテキストURL EAR_13_1_1.pdf
著者 Towhida Rashid| Md. hossain Monsur| 鈴木 茂之|
抄録 With regards to the origin and evolution of the Pleistocene tracts (Lalmai, Madhupur and Barind tracts) of Bangladesh, two trends of thoughts are common. Most of the authors believed that the Madhupur, Barind and Lalmai tracts represent tectonically uplifted surface. Some researchers have different opinion and they believed that the Lalmai hills and the Madhupur locality represent tectonically uplifted blocks but the whole Barind tract and the major portion of the Madhuput tracts are not tectonically uplifted, rather these are originated by erossional-depositional processes. In order to solve the problems associated with origin and evolution of Pleistocene tracts of Bangladesh, further study is needed. Borehole data may be collected and fusion images can be prepared from aerial photographs and setellite images to detect netectonic imprins and geomorphological signatures of the areas. Elaborate laboratory analysis of sediment deposits, radiocarbon dating my indicate a new dimension about the origin and evolution of these tracts.
キーワード Bangladesh Lalmai Hill Barind Tract Madhupur Tract Neotectonices Aerial photographs Satellite Image Fusion Image
出版物タイトル Okayama University Earth Science Report
発行日 2006-03-31
13巻
1号
開始ページ 1
終了ページ 13
ISSN 1340-7414
言語 English
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310445