So some of them are preserved subaqueously, so in lakes and material like that, and some of them are preserved in on flats between the lakes where you have overbanked deposits during flooding.

所以其中一些保存在水下，所以在湖泊和类似的材料中，其中一些保存在湖泊之间的平原上，在洪水期间你有过度的沉积物。