| 名稱 菊石結核化石 | Name Dactylioceras commune (mounted) Ammonite Fossil |
| 地質年代 下侏羅紀 | Geological Age Lower Jurassic |
| 描述 菊石化石是一群已經滅絕的海洋生物，生存於中奧陶世至晚白堊世，因它的表面通常具有類似菊花的線紋而得名。菊石的殼體是一個以碳酸鈣為主要成分的錐形管。殼管的始端細小，通常呈球形或桶形，稱為胎殼。絕大多數菊石的殼體以胎殼為中心在一個平面內旋卷，少數殼體呈直殼、螺卷或其他不規則形狀。 | Description Dactylioceras was a widespread genus of ammonites from the Lower Jurassic period, approximately 180 million years ago. Dactylioceras are generally small, averaging 65 millimetres (2.6 in) in diameter. They have a strong, ribbed shell. The ribs are slightly inclined forward, running over the outer edge, and either simple or forking at outer end. |
| 地點 約克夏，英國 | Location Whitby, Yorkshire. UK. |
| 參考 Reference https://en.m.wikipedia.org/wiki/Dactylioceras | |
| 編者 由 3E (6) 陳子桐 於4/6/2018編寫 _________ 於17/1/18最後編改 | Editor Created by 3E (6) Chan Ysz Tung on 4/6/2018 Last modified by ________ as on 17/1/2018 |
