認識岩石—變質岩岩石的循環
火成岩火成岩受到風化、侵蝕、沈積和變質作用。
變質岩板岩是頁岩度變質而成的,200萬年前海浪沙灘上的生痕化石
變質岩1.9到3.5公分厚的板岩
變質岩頁岩也是由砂頁、頁岩變成,風化後會形成一小片一小片的。
變質岩片麻頁是由花崗岩或砂岩變質,上面有一顆顆黑白斑點的礦物結晶
變質岩變質砂岩是砂岩在地下因為高溫或壓力結構發生變化而形成。
變質岩大理岩是由石灰岩變質而來的
圖片來源:   1. Cross Section Illustration Of Showing Rock Cycle. Photography. Encyclopædia Britannica Image Quest. Web. 26 Jul 2011. http://quest.eb.com/media/image.htm?mediaId=118_840362   2. Slate. Photograph. Encyclopædia Britannica Image Quest. Web. 27 Jul 2011. http://quest.eb.com/media/image.htm?mediaId=139_1897392   3. Shale. Photograph. Encyclopædia Britannica Image Quest. Web. 26 Jul 2011. http://quest.eb.com/media/image.htm?mediaId=118_810182   4.Mica Schist. Photography. Encyclopædia Britannica Image Quest. Web. 27 Jul 2011. http://quest.eb.com/media/image.htm?mediaId=139_1932693   5. Gneiss. Photograph. Encyclopædia Britannica Image Quest. Web. 27 Jul 2011. http://quest.eb.com/media/image.htm?mediaId=139_1900048   6..Cut Surface Of Metamorphic Sandstone Rock. Photography. Encyclopædia Britannica Image Quest. Web. 27 Jul 2011. http://quest.eb.com/media/image.htm?mediaId=132_1232746    7. Marble. Photography. Encyclopædia Britannica Image Quest. Web. 27 Jul 2011. http://quest.eb.com/media/image.htm?mediaId=119_1792670

變質岩