Liji Fm
Type Locality and Naming
Southeast Taiwan. The type section is located at Liji Village ~8 km north by west of Taitung County, Taiwan.
Lithology and Thickness
Typical mélange, consisting predominantly of chaotically stratified, dark gray, very thick-bedded mudstone and small numbers of exotic blocks and rock fragments in the mélange. The thickness varies from place to place, being at least >1061 m. The mudstone is lacking in distinct stratification and seems chaotic; it shows a complex, compact scaly schistose structure formed by disruption and shear. Most exotic blocks are sandstone and ophiolites with small numbers of small blocks of siltstone, shale, limestone and andesite agglomerates.
Relationships and Distribution
Lower contact
Its relation with the Neogene Dagangkou Fm is complex but should be mainly in faulted contact; it probably has an unconformable contact with the underlying Miocene–Pliocene Duluanshang Fm.
Upper contact
It is in fault contact with the overlying middle Pleistocene Beinanshan Fm.
Regional extent
The mélange is mainly distributed in the southern part of the Coast Range, extending in a zone from Zhili of Lienhua County southward to the northern side of Taitung County, ~70 km long and 2–3 km wide.
GeoJSON
Fossils
Sphaeroidinella dehiscens, Pseudoemiliania lacunose, Gephyrocapsa oceanica.
Age
Depositional setting
The mélange originated mainly by collision due to the subduction of the South China plate beneath the Philippine plate.
Additional Information