51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔的下部单元良好的屑质和海相海绿石质。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑以类为主，其中又以石英类和屑类为主，缺少长石类。

The flowline for air or gas drilling.

Blooie line（气体钻井的排屑管）.

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油组主要沉积中和含砾中，度整体较粗，性较好，磨圆度以次棱角状为主，石类型为长石屑。