It was made of black, glassy lava mixed with bits of feldspar.

它成分为黑色和坡火山石，同时大杂了长石碎片。

These final samples are all plagioclase feldspars.

这些最终样品都是斜长石。

Their research indicates that the DNA molecules can cling to minerals of feldspar and clay, which protect them from further damage.

他们研究表明，DNA分子可以附在长石和粘土等上，保护它们免受进一步损害。

White sand beaches are also mostly made of quartz, but the sand heads hasn't been tinted by iron oxide for feldspar.

白色沙滩也大多是用石英构成，但长石没有被氧化铁染色。

As you know, feldspars are the most abundant minerals and are divided into a number of types.

如您所知，长石是储量最丰富，分为多种类型。

Tan sand is the most common, and it's made up of a rock called quartz that's been tinted by a chemical called iron oxide and another mineral called feldspar.

棕褐色沙子是最常见，是由一种叫做石英岩石组成，这种石英被一种叫做氧化铁化学和另一种叫做长石色。

Most of the broad summit is comparatively level and thick sown with crystals, quartz, mica, hornblende, feldspar, granite, zircon, tourmaline, etc., weathered out and strewn closely and loosely as if they had been sown broadcast.

宽阔峰顶大部分较为平坦， 密布水晶、石英、云母、角闪石、长石、花岗岩、锆石、电气石等，经风化后，密布、松散， 犹如播种。

Listening, admiring, until late in the afternoon I compelled myself to hasten away eastward back of rough, sharp, spiry, splintery peaks, all of them granite like the Cathedral, sparkling with crystals—feldspar, quartz, hornblende, mica, tourmaline.

边听边欣赏，直到下午晚些时候，我才强迫自己加速向东撤退，回到粗糙、尖锐、尖尖、多裂山峰，所有这些山峰都像大教堂一样花岗岩，闪闪发光晶体——长石、石英、角闪石、云母、电气石。

The walls assumed a crystallised though sombre appearance; mica was more closely mingled with the feldspar and quartz to form the proper rocky foundations of the earth, which bears without distortion or crushing the weight of the four terrestrial systems.

墙壁呈现出结晶但阴沉外观;云母与长石和石英更紧密地混合在一起， 形成了地球适当岩石基础，其承受不会扭曲或压碎四个陆地系统重量。