A shale formation with sandstone interbedded is also a potential oil bearing formation.是什么意思？

A shale formation with sandstone interbedded is also a potential oil bearing formation.

以泥岩为主,夹砂岩的地层也可能是油气层.

shale

n. [矿]页岩，泥板岩；

例句
Resinite is a rich n 1 aceral in Teriary humic coal, boghead - cannel coal and oil shale fromHuangxian Coalfield.
黄县煤田第三纪腐殖煤 、 藻烛煤、油页岩显微组分富含树脂体.

formation

n. 形成，构成，结构，形成物，编队，队形；

例句
The Prime Minister resigned today, clearing the way for the formation of a new government...
首相今天的辞职为新政府的组建扫清了道路。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

sandstone

n. 砂岩，砂石；

例句
...a sandstone bed.
砂岩层

interbedded

adj. 层间的，夹层之间的；

例句
Sandstones are, as a rule , interbedded with shales.
砂岩通常都与页岩互层.

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

also

adv. 也，同样，并且；conj. 另外；

例句
The media have also abetted the feeling of unreality.
媒体也在一旁对这种非现实感推波助澜。

potential

adj. 潜在的，有可能的，[语法学]可能语气的，表示可能性的，有能力的；n. 潜力，潜能，[物]电位，势能，潜能的事物，[语]可能语气；

例句
Talbot was presented with 80 potential avenues of investigation...
给塔尔博特提出了80种进行调查的可能途径。

oil

n. 油，石油，油画，燃油；vt. 给…加油；vi. 化成油；

例句
Several magnificent oil paintings adorn the walls.
几幅恢宏的油画装点着墙面。

bearing

n. [机]轴承，支座，关系，方位，态度，举止；v. 忍受(bear的ing形式)；

例句
...note paper bearing the Presidential seal...
盖有总统印章的便笺