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

伊格尔的下部单元是分选良好的质和海相海绿石质。

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

碎类为主，其中又石英类和类为主，缺少长石类。

The flowline for air or gas drilling.

Blooie line（气体钻井的排）.

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，粒度整体较粗，分选性较好，磨圆度次棱角状为主，石类型为长石。