Awazu shell mound

Awazu shell mound (あわづかいづか) is a remain of the bottom of a lake seen near Seta River of the biwa Hunan edge (shell mound). I may be called the remains of Awazu bottom of a lake (あわづこていいせき).

Table of contents

Commentary

There is the Awazu shell mound in Otsu-shi, Shiga. The latitude and longitude is 34°58'53" N, 135°54'28" E [¹]. Speaking of a shell mound, it is the ancient dump site where I threw away the husk of the shellfish which I adopted from the sea mainly. However, the Awazu shell mound is the ancient dump site where I threw away the husk of the shellfish which I adopted from Lake Biwa (freshwater lake) mainly. Therefore, the shellfish excavated from Awazu shell mound is a husk of the fresh water-related shellfish. For example, the shells of the corbicula are excavated [²]. In addition, 77% of shellfishs have the findings that it was a shell of the Corbicula sandai [³]. But the thing except the shell was excavated like bone (forktail bullhead, carp, catfish, crucian carp, ワタカ) of the bone (terrapins) fish of mammalian bone (wild boar, deer) reptiles, too [⁴]. Furthermore, the peel of a buckeye and an acorn (fruit of the yew chinquapin) and the vegetable thing including the water caltrop were excavated, too [⁵]. In addition, the artifact such as the earthenware vessel was excavated, too [⁶]. In addition, it is thought to be the Middle time of the Jomon period that here was used as a dump site. That this Awazu shell mound was discovered in 1952 by Kenjiro Fujioka [⁷]. I was able to confirm the state that a white shellfish sank into the bottom of a lake in those days in 1952 even from a ship [⁸].

The generation that was formed

As a result of radioactive age measurement with the carbon 14 which is a radioisotope of carbon formed by cosmic rays naturally, it is thought that the Awazu shell mound was formed 5,000 years ago for 4,000 years [⁹]. But the piece of the rind of a fruit of a seed and a water caltrop and the chestnut of the gourd more than 9,000 years ago and the co-Japanese oak was discovered, too [¹⁰].

Change of the lake surface

I exist now in the bottom of a lake of Lake Biwa because the another name of the remains of Awazu bottom of a lake is in the Awazu shell mound to be clear. However, originally I was not formed in the bottom of a lake. Because the water level of Lake Biwa in the middle of Jomon period when this shell mound was formed was lower than the present, it was located in the bottom of a lake now and was located in the Lake Biwa lakefront in those days [¹¹]. In addition, here is in the findings that it was an east bank of Lake Biwa in those days [¹²]. Remained without the surface of a lake bottom vegetable garbage which was easy to be broken down by a microbe because was depressed being completely dismantled with a change of the water level of Lake Biwa in this way until the present age [¹³]; [¹⁴]. Therefore, it was able to become the archeological document which knew the eating habits of the times when this shell mound was formed.

Source

1. ^ I want to know the correct position (latitude longitude) of the remains of Awazu bottom of a lake. (reference cooperation database)
2. I strip off the section of the shell mound of the remains of ^ Awazu bottom of a lake (あわずこていいせきのかいづかのだんめんはぎとり)
3. ^ exhibition room: The history of person and Lake Biwa
4. ^ Ishiyama shell mound and Awazu shell mound
5. ^ Ishiyama shell mound and Awazu shell mound
6. Ten pages of topography environment of the remains of ^ Awazu bottom of a lake
7. Ten pages of topography environment of the remains of ^ Awazu bottom of a lake
8. ^ Ishiyama shell mound and Awazu shell mound
9. Chip of wood excavated from the ̶ layer of the remains of ^ Awazu, Shiga bottom of a lake third shell mound, mammalian spicule, comparison 243 pages in the radiocarbon generation of the Corbicula sandai shell fossil and 244 pages
10. ^ Chip of wood excavated from the ̶ layer of the remains of Awazu, Shiga bottom of a lake third shell mound, mammalian spicule, comparison in the radiocarbon generation of the Corbicula sandai shell fossil Page 239
11. I strip off the section of the shell mound of the remains of ^ Awazu bottom of a lake (あわずこていいせきのかいづかのだんめんはぎとり)
12. 12 pages of topography environment of the remains of ^ Awazu bottom of a lake
13. ^ Ishiyama shell mound and Awazu shell mound
14. 12 pages of topography environment of the remains of ^ Awazu bottom of a lake

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