Geochemical Analysis as a Complementary Tool to Estimate the Uplift of Sediments Caused by Shallow Gas Hydrates in Mounds at the Seafloor of Joetsu Basin, Eastern Margin of the Japan Sea

Table 1

PC701; (unit)	Dating; source	Depth; (mm)	Age; (cal ka BP)	Sedimentation rates; (mm/ka)
1	Estimate	0	Present?	177
1	^14Cforam	800	4,490 ± 40	177
1	U-Oki	1900	10,700 ± 100	1750
2 (TL-1)	^14Cforam	2600	11,100 ± 70	133
4 (TL-2)	^14Cforam	3630	18,334 ± 70	254
4 (TL-2)	^14Cforam	4340	21,078 ± 60	221
5	AT	6000	28-29