Page 46 - 雕鐫海之角

Folds are formed within sedimentary strata that
have undergone deformation. Sedimentary folds are
the result of slumping of sedimentary material before
it is lithified. Folds distributed on a regional scale
constitutes a fold belt, a common feature of orogenic
zones.
褶皺 folded sedimentary features, and some of these may 向斜 背斜構造
At the North East Scenic Area, there are many
與
Fold be observed on the wave cut platforms. Syncline and Anticline

造山帶的岩層經擠壓變形產生波狀、盆狀、
鐘形等彎曲型態，稱褶皺或褶曲。東北角海岸有

許多海蝕平臺，都展示著岩層褶皺的現象。
岩層發生褶皺，其岩石中的礦物組成或顆粒
結晶排列有可能經過重新調整。

岩層經褶皺，若中心部位向上拱起，兩翼岩 A syncline is a part of a folded structure and
is a geological structure that has resulted from
層各自朝相反的方向傾斜，愈近褶皺中心，其地
compression of the landscape. The strata bends and
層年代愈老，稱為背斜。若中心部位擠壓向下凹
the younger strata is at the downward part.
陷，兩翼岩層朝同一中心傾斜，愈近褶皺中心， As seen in a vertical section, a fold may have
其地層愈來愈年輕者，稱為向斜。褶皺的形狀常 an upwards (antiform) or downwards (synform)
morphology. Bitou cape is a typical axis of syncline
變化多端，褶曲角度亦不相同，鼻頭角便是一個
structure. The strata is close to horizontal.
接近向斜中心軸部的地方，岩層展開接近水平。

地質圖書 Geopark at Northeast and Yilan Coast National Scenic Area