英国南部在早白垩纪是一片广阔的泛滥平原,其范围从今天的伦敦向南延伸,一直越过法国和比利时。河流与溪流从山顶向下奔流,在平原上蜿蜒而行,一路向北,途中填满了许多湖泊,当河水到达三角洲的时候,由于受到沉积物的阻碍,河水流淌的速度慢了下来。远古时候的伦敦丘陵地带覆盖着针叶 In the early Cretaceous, southern England was a vast floodplain, stretching southward from London today, past France and Belgium. Rivers and streams run down from the top of the mountain, meandering down the plains, all the way north, filled with lakes on their way, and as the river reaches the delta, the river is slowing down due to obstructions from sediments. Ancient London hills covered with needles