Page 11 - 雕鐫海之角

epresenting the geological development of the earth over
東北角海岸的大地構造
Geological Characters
of the Northeast Coast
of Taiwan
回 顧地球億萬年來的地質演變，北部海岸可以說是臺
灣的縮影。它從華南邊上的一片陸地下沉成海，再
從海底被擠上高山。此區主要的地形分成陸地地形與海岸
地形。陸地地形屬丘陵地形，以澳底為界。海岸地形以三
貂角為界，以北是標準的岬灣海岸地形，以南因其地質構
造與海岸線平行，故少岬灣，海岸線較平直。岩石經過幾
百萬年不斷的侵蝕、磨蝕、風化、搬運等作用，形成各式
各樣的特殊地景。
就區域地質與構造而言，東北角地區包含雪山山脈地
層、西部麓山帶新第三紀之地層，因板塊運動產生擠壓、
褶皺等構造，形成東北角地區的地形沿東北－西南向的線
形排列。
地質圖書
0
Rthe past hundreds of millions of years, the northern coast
can be regarded as the epitome of Taiwan.
The north coast is formed because of the constant
erosion and weathering by the northeastern monsoon and
great typhoon waves for long duration of time ever since the
emergence of the island of Taiwan. There are various kinds
of natural strange and spectacular rocks, such as weathering
rings, mushroom shaped rock, honeycomb rocks, trace fossils,
bean curd-shaped rock, cuesta and marine-cut platform. The
main scenic spots are Nanya spectacular rock, Bitou Cape,
Longdong Coast Park, Longdong South Ocean Park, Ma-gan,
Lailai Marine-cut platform, Beiguan Sea Tide Park, and Turtle
Island.
The Northeast area can be classified into three blocks
according to the stratum periods and the degree of
deterioration of the rock strata. Slightly weathered (Sheishan
mountain stratum), intermediate weathered zone (Aoti
Massif), and the late Tertiary periods strongest weathered
rocks of the western mountain foothills.
The northeastern coast area includes the Sheishan
mountain metamorphic strata of the late Tertiary period. The
topography of the area is aligned along the northeast to the
southeast geological structures. Igneous rock, such as quartz-
andesite, occur at Keelung Hil. Mineralization at Chinkuashih
and Giufen areas contain abundant minerals such as gold and
coppers.
The Longdong and Chiuchi faults are the boundary
between the sedimentary , transition and metamorphic rocks
which outcrop from west to east along the coast. North of
Longdong fault are the foot hill of the Sheishan Mountain.
South of the Chiuchi fault are the Sheishan Mountain strata.
Between the two faults lies the massif of Aoti, which is the
intermediate zones of two geological districts mentioned
above.
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Geopark at Northeast and Yilan Coast National Scenic Area