CENTRAL GEOLOGICAL SURVEY, MOEA

	Introduction
	Earlier Geologic Maps of Taiwan
	Geographic Setting
	General Geology And Geologic Provinces Of Taiwan
	Explanation Of Legend And Representation Of Geologic Data
	Eastern Central Range
	Western Central Range Backbone Ridges
	Western Foothills
	Eastern Coastal Range
	Geology Of The Hengchun Peninsula
	Major Geologic Features Of Taiwan
	Plate Tectonic Setting
	References

:::Eastern Coastal Range

General Description	Stratigraphy and Lithology	Geologic Structure	Geologic History	Longitudinal Valley of Eastern Taiwan

Geologic Structure

The Neogene rocks in the Coastal Range were folded into a series of NNE- trending anticlines and synclines with the Tuluanshan Formation forming the core of most major folds. The folds have been cut by several thrust faults, which dip mainly to the east (Fig. 8). No metamorphic effect has been noted in this eastern fold-and-thrust belt. Because massive agglomerate is the dominant lithology, the imbricate thrust fault system in this tectonic belt is not as clearly defined and well- developed as that in the western foothills, where well-bedded stratified rocks are dominant. A series of structure cross sections of the Coastal Range from north to south is shown in Fig. 8. Most of the thrust faulting in the Coastal Range appears to be younger than early Pleistocene (Chi et al., 1981).

Figure 8. Schematic structure cross sections of the Coastal Range (Angelier and Barrier, 1986)

A more complete analysis and elucidation of the tectonic development of the Coastal Range is not yet possible because only limited areas have been studied in detail. More extensive petrotectonic, stratigraphic, structural, and other studies over the entire mountain range are essential to clarify the overall tectonic evolution of eastern Taiwan.

:::© CENTRAL GEOLOGICAL SURVEY, MOEA

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