ultramarinus – beyond the sea

280 MILLION-YEAR-OLD GEOLOGICAL PARADISE, Ma Shi Chau (馬屎洲), Hong Kong

Ma Shi Chau (馬屎洲), which literally means “horse excrement island”, is a tidal island off a traditional fishing village Sam Mun Tsai (三門仔) at the northeastern New Territories near Tai Po (大埔).  Facing the Tolo Channel opposite from the dam of Plover Cove Reservoir (船灣淡水湖), Ma Shi Chau belongs to the UNESCO Geopark network in Hong Kong.  The remote tidal island is famous for its unique rock formation and outcropped strata dated back to the Permian Period (280 million years ago).

Ma Shi Chau is accessible via Ma Shi Chau Sand Bar (馬屎洲橫水渡).  A short hike on known as Ma Shi Chau Nature Trail will bring visitors to walk along the southeast coast of the island.  Along the coastal areas, unique and colourful rock formations are visible everywhere.  Millions of years ago, Ma Shi Chau was a basin in which surrounding waters continuously to deposit sediments such as sand and gravel.  Over the years as water level changed and so as the kinds of sediments accumulated.   Sedimentary rocks were formed after the process of lithification.  Vaults and folds are also visible on Ma Shi Chau as tectonic movements caused by volcanic activities transformed the rock surface.  Like many parts of Hong Kong, granite is also present at Ma Shi Chau as a result of magma intrusion during the Jurassic Period.  Other than rocks, views of the Pa Sin Leng Mountain (八仙嶺) to the north, and the new town of Ma On Shan to the southeast across the Tolo Harbour (吐露港) are equally impressive.

DSC_3191Sam Mun Tsai (三門仔) is a small fishing village inhabited mainly by former boat people (fishermen families who lived on their boats in typhoon shelter).

DSC_3195From Sam Mun Tsai, a short walk brought me up to a hill dotted with graves.  On the high point, fish farming nets in the waters of Plover Cove.

DSC_3197The trail continued to wind through the ridge of a hill dotted with graves.

DSC_3202The trail then went downhill to the Ma Shi Chau Sand Bar (馬屎洲橫水渡), a natural sand bar that originally would be submerged in water during during high tide.  Over the years, villagers put boulders and sediments on the sand bar, so that it would be exposed above water even during high tide.

DSC_3205Today, the Ma Shi Chau Sand Bar is a convenient venue for a leisure stroll and water activities such as sea kayaking.

DSC_3204The Ma Shi Chau Sand Bar is also the gateway to the Ma Shi Chau Special Area, part of the Hong Kong Geopark.

DSC_3247On Ma Shi Chau Island, there is a short trail called Ma Shi Chau Nature Trail (馬屎洲自然教育徑) bringing visitors to a number of coastal woods and rock beaches.  Giant Golden Orb Weaver, one of the largest kinds of spiders in the world, are quite common in the woods.  Some of these are about the size of a human palm.

DSC_3267Visitors are usually fascinated by the rock formations when arriving at the first open coastal area.

DSC_3295Vaults and folds are visible at Ma Shi Chau due to prehistoric tectonic movements caused by volcanic activities.

DSC_3299Many of the outcropped strata and rock formations are colourful and eye catching.

DSC_3310Details of interesting rock formation on Ma Shi Chau.

DSC_3319Details of interesting rock formation on Ma Shi Chau.

DSC_3331Details of interesting rock formation on Ma Shi Chau.

DSC_3347To the northeast of Ma Shi Chau across the Plover Cove (船灣海), the 2km dam of Plover Cove Reservoir (船灣淡水湖) is only a few hundred metres away.

DSC_3352To the southeast across Tolo Harbour (吐露港), the new residential developments below Ma On Shan (馬鞍山) look like a bunch of toy blocks.

DSC_3359Construction of the new town of Ma On Shan began in 1980s, including private residential developments and public housing estates.

DSC_3363

DSC_3366Fishermen may still test their luck in the Tolo Harbour.

DSC_3371In late afternoon, Pa Sin Leng Mountain (八仙嶺) north of Ma Shi Chau looks gorgeous.

DSC_3374Under the shadow of Pa Sin Leng Mountain (八仙嶺), the tiny island of Yeung Chau and the fish farms in the Plover Cove (船灣海) look like a peaceful picture.

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