Buried tidal marsh or coastal forest soils point to sudden land subsidence of about 1 meter occurring at the same time from Vancouver Island to Northern California.
埋在地下的潮汐沼泽及沿海森林土壤使温哥华至加利福尼亚州北部一带的地面沉降1米左右。
2
The oil that has reached the shore may exacerbate the problem of land loss by poisoning the marsh grasses that hold the delicate coastal sands and silts together.