请中翻英一段话：简 介 硅化木又称“木化石”.主要化学成份是二氧化硅,矿物 名称为石英岩,质地坚硬致密.在中国,硅化木的

硅化木又称“木化石”.主要化学成份是二氧化硅,矿物
Silicified wood is also named as fossil wood.Its chemical constituents are silicon dioxide and mineral substances.
名称为石英岩,质地坚硬致密.Name:quartzite,with rigid and compact texture.
在中国,硅化木的分布时代集中在 1 亿 5 千万年前的中生代,即恐龙时代；多数是侏罗纪和白垩纪 的植物,也是被子植物出现时期的植被类型.地理分布主要在新疆自治区、四川等地.
In China,the distribution epoch of silicified wood concentrated in Mesozoic,also named as Dinosaur age 150 million years ago.Most of them formed with the plants in Jurassic and Cretaceous period which was a vegetation form when the angiosperm emerged.The geological distribution is In Sinkiang Autonomous Region,Szechwan Province etc.
我把专业词汇给你写出来,便于你总结：
Silicified wood
fossil wood
chemical constituents
silicon dioxide
mineral substances
quartzite
texture.
distribution epoch
Mesozoic
dinosaur age
Jurassic Period
Cretaceous Period
vegetation form
angiosperm
geological distribution