Laguna : 汽水域研究

Research Center for Coastal Lagoon Environments, Shimane University

ISSN:2185-2995(online)
ISSN:1340-3834(in print)

number of downloads : ?

Use this link to cite this item : https://ir.lib.shimane-u.ac.jp/3034

Laguna : 汽水域研究 5

1998-03 発行

出雲平野中央部小山遺跡における地質層序と古環境

Stratigraphy and Paleoenvironment of the Oyama Site, Central Izumo Plain, Shimane Prefecture, Japan

Watanabe, Masami

Endo, Masaki

File

d0070005l023.pdf 1.88 MB

Description

Some researches on paleoenvironment have been carried out by using the method of ash stratigraphy and facies analysis of core data drilled in Izumo coastal plain, southwest Japan.
In this paper, we discuss on the stratigraphy and paleoenvironment of the Oyama archaeological site, central Izumo plane based on the sedimentary facies, ^14C age, pollen analysis and diatom analysis.
The followings are clarified :
(1) This area is underlain by Tsunoi-tephra.
(2) Slightly elevated mounts in this area were composed of the 1st fluvial sand layer, or 2nd fluvial sand layer.
(3) The groundwater level around this area in 4800y.B.P. was about ± 0m, and reedy marsh with Alnus trees in the near area was expanded.
(4) 1300 years ago, the river improvement in this area was finished, then it became to marsh. Soon after, the marsh was reclaimed to a paddy field.

About This Article

d0070005l023.pdf 1.88 MB

Other Article

Improving Lagoonal Environments for Future Generations : A Case Study of Lakes Nakaumi and Shinji,Japan (Study of the Past)/

PP. 巻頭1 - 3

Holocene Environmental Change of a Coastal Lagoon, Shinji-ko, Southwest Japan, Based on the Analyses of the Core SJ 96 /

PP. 1 - 13

Benthic Foraminiferal Changes in Relation to Human Activities(Part 5) : Implication of the Ammonia Event and the Environment of Lake Shinjiko in the Year 2005/

PP. 15 - 26

Stratigraphy of bottom sediments in Lake Tougou-ike, Tottori Prefecture and Non-glacial Varves/

PP. 27 - 37

Flood Events Recognized from Lake Sediments in Lake Jinzai, Shimane Prefecture, Japan/

PP. 39 - 46

Paleoenvironmental Changes of Lake Hamana and Lake Shinji during the Last 10,000 Years, Inferred by Diatom Assemblages from Lake Core Sediments/

PP. 47 - 53

Falling Age of Baegdusan-Tomakomai Tephra(B-Tm) Estimated by Using Non-glacial Varves/

PP. 55 - 62

Recent Progress on Collecting and Analyzing Methods of Brackish Lake Sediments/

PP. 63 - 73

The Applications of Diatom Assemblages to Reconstruct Paleoenvironmental Changes at Brackish Lakes in Japan : The Trends of Recent Studies and Their Problems/

PP. 75 - 79

The Relationship Between Environments and Ostracode Assemblages from Miho Bay to Lake Shinji/

PP. 81 - 91

Ostracode Assemblages from Lake Hamana, Shizuoka Prefecture, Japan, in 1996/

PP. 93 - 99

Polychaete Fauna of Lake Shinji, Lake Nakaumi and Lake Jinzai, Shimane, Japan/

PP. 101 - 108

Molluscan Fauna of Lagoon Saroma, Hokkaido/

PP. 109 - 116

Macrobenthic Fauna in Lake Abashiri, Hokkaido, Northern Japan/

PP. 117 - 122

Distribution of Organic Carbon, Nitrogen and Sulfer Contents in Surface Sediments of Brackish Coastal LakesNakaumi and Hamana, Japan/

PP. 123 - 135

Water Quality and Bottom Environment of Lake Kamo, Sado Island, Northeast Japan/

PP. 137 - 152

Environmental Changes Based on the Littoral Morphology of the Coastal Lagoons in Japan/

PP. 153 - 159

Water-mass Movement in the Channels around Honjo Area of Lake Nakaumi, Southwest Japan/

PP. 161 - 173

Characteristics of Water Quality in the Honjo Area of Brackish Lake Nakaumi/

PP. 175 - 182

Water Quality Mapping in Lake Shinji and Lake Nakaumi Using Satellite Remote Sensing Data(Part 1) : Horizontal Distribution of Secchi Depth, Suspended Substance Concentration and Chlorophyll-a Concentration under Algal Bloom Condition/

PP. 183 - 196

Saline Wedge at River Gonokawa : Development of Long-term Observation System of Saline Wedge Behaviour (Preliminary Report)/

PP. 197 - 208

A Study on the Cave Sites at Shimane Peninsula : The Survey at Location Rock Shelter on the West of Sarugahana Todai Cave Site, Mihonoseki Town, Shimane Prefecture/

PP. 209 - 213

Stratigraphy and Paleoenvironment of the Oyama Site, Central Izumo Plain, Shimane Prefecture, Japan/

PP. 215 - 223

Growth and Photosynthetic Characteristics of Vulnerable Species Zannichellia Palustris L./

PP. 225 - 231

Brackish Sediments of Lake Cootharaba in the Eastern Coast of Australia/

PP. 233 - 236

Seasonal Changes in the Number of Water Birds Observed in Honjou Area, Lake Nakaumi/

PP. 237 - 242

Grain-size Analysis of the Bottom Surface Sediments in Lake Abashiri, Northeast Hokkaido, Japan/

PP. 243 - 245

Preliminary Note on the Geomorphic Development of the Eastern Coast Plains of the Peninsula India : With Special Reference to the Age of Formation of the Kolleru Lagoon and the Krishuna Delta/

PP. 247 - 251

Improving Lagoonal Environments for Future Generations : A Case Study of Lakes Nakaumi and Shinji,Japan (Study of the Present)/

PP. 巻頭4 - 5

Improving Lagoonal Environments for Future Generations : A Case Study of Lakes Nakaumi and Shinji,Japan (Toward the Future)/

PP. 巻頭6 - 7

Improving Lagoonal Environments for Future Generations : A Case Study of Lakes Nakaumi and Shinji,Japan (A Problem Awaiting Solution)/

PP. 巻頭8 - 10

The Center's Affairs/

PP. 253 - 254

The Center's Affairs/

PP. 255 - 260