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

成为黑色和坡璃质火山，同时大杂了碎片。

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，是由一种叫做英岩组成，这种英被一种叫做氧化铁化学物质和另一种叫做矿物着色。

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子可以附着在和粘土等矿物上，们免受进一步损害。

The rock is densely constructed, thanks to how well its fine-grained crystals and the feldspar interlock.

这种岩结构致密，得益于其细粒晶体与紧密嵌合。

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英构成，但并没有被氧化铁染色。

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——、英、角闪、云母、电气。

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.

宽阔峰顶大部较为平坦， 密布着水晶、英、云母、角闪、、花岗岩、锆、电气等，经风化后，密布、松散， 犹如播种。

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

如您所知，是储量最丰富矿物，为多种类型。

These final samples are all plagioclase feldspars.

这些最终样品都是斜。