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甘肃马鬃山地区的陆相晚中生代地层,应隶属北山地层分区。1969年甘肃省1:20万区测时将该地区一套砖红色泥质岩夹灰绿色粉砂质泥岩及灰白色砂砾岩地层笼统归于晚侏罗
The late Mesozoic strata in the Mazongshan area of Gansu should be subdivided into Beishan formation. In 1969 Gansu Province, 1: 200,000 zone measured when a set of brick red muddy sandstone gray-green silty mudstone and gray-white sandy conglomerate generally attributed to Late Jurassic