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Between Xiaochijiao and Chima areas in Xiyu Township, Xueziwei exposes an expansive tidal flat and rocky terrain as tides recede. The sea-eroded platform reveals numerous mollusks and intertidal creatures like snails, while adjacent sandy beaches make Xueziwei's sea-eroded platform one of the hidden natural treasures of Penghu. The volcanic terrain around Xueziwei in Xiyu Township mainly consists of siliceous basalt formations, prominently featuring columnar joints of basalt, alongside smaller volcanic vents and flat volcanic craters. Scholars speculate that the Xueziwei sea-eroded platform once originated as a vast flat volcanic crater's lava lake. Through marine erosion from waves gradually retreating the coastal cliffs, this process formed an almost sea-level flat rock terrace. The platform is scattered with small flat volcanic craters, fumaroles (gas vents), tide pools, and pot holes shaped by seawater erosion. Beyond the special geological features created by volcanic activity and marine erosion, Xueziwei's sea-eroded platform boasts extensive tidal flats. The wide and diverse geology of Penghu's intertidal zones experiences alternating wet/dry cycles from tides, combined with ample sunlight, resulting in thrives diverse intertidal ecosystems. During low tide at Xueziwei, local residents collect snails from the expansive tidal flats, while hermit crabs, black sea cucumbers, and other wildlife can be observed. High tides submerge the platform, transforming nearby uplifted rocky areas into small land-connected islands composed of coral fragments. In calm low tides, these elevated reef zones become popular rock-fishing grounds for enthusiasts due to complex underwater terrains and abundant marine life - ideal for fish feeding and spawning, leading to abundant fish resources. Visiting the secluded Xueziwei lets visitors experience its unique sea-eroded geological formations and rich intertidal biodiversity. Strolling along adjacent beaches overlooking endless horizons, waves' sounds and one's own heartbeat create serene moments to escape worldly stress.【Recommended Visit Time】1 hour