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.
Sam 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).
From 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.
The trail continued to wind through the ridge of a hill dotted with graves.
The 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.
Today, the Ma Shi Chau Sand Bar is a convenient venue for a leisure stroll and water activities such as sea kayaking.
The Ma Shi Chau Sand Bar is also the gateway to the Ma Shi Chau Special Area, part of the Hong Kong Geopark.
On 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.
Visitors are usually fascinated by the rock formations when arriving at the first open coastal area.
Vaults and folds are visible at Ma Shi Chau due to prehistoric tectonic movements caused by volcanic activities.
Many of the outcropped strata and rock formations are colourful and eye catching.
Details of interesting rock formation on Ma Shi Chau.
Details of interesting rock formation on Ma Shi Chau.
Details of interesting rock formation on Ma Shi Chau.
To 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.
To 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.
Construction of the new town of Ma On Shan began in 1980s, including private residential developments and public housing estates.
Fishermen may still test their luck in the Tolo Harbour.
In late afternoon, Pa Sin Leng Mountain (八仙嶺) north of Ma Shi Chau looks gorgeous.
Under 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.
SUNSET OVER OYSTER WATERS, Lau Fau Shan (流浮山), Hong Kong

For 700 years, oysters have been farmed in the water of Deep Bay/ Shenzhen Bay (后海灣) near the sleepy village of Lau Fau Shan (流浮山). Situated in the Pearl River Estuary where fresh water constantly enters the bay, Deep Bay/ Shenzhen Bay is a perfect site for oyster farming. Today, Lau Fau Shan is the last remaining site in Hong Kong that oyster cultivation still exists. Generations of oysters and oyster sauce consumption have put these molluscs an important part of cultural heritage of, not just Lau Fau Shan villagers, but Hong Kong citizens in general. In fact, the oyster species cultivated in Lau Fau Shan is known as Crassostrea hongkongensis, which is named after the city itself. Oyster farming has gone through a gradual decline since 1980’s, partly due to climate change, ocean acidification and deterioration of local water quality, and partly due to stronger competition of foreign oysters in the local market in recent years. Apart from oysters, Lau Fau Shan is also best known for its seafood restaurants and the romantic sunset over the tidal flats. Standing by the waterfront, the Hong Kong-Shenzhen Western Corridor (深港西部通道) or Shenzhen Bay Bridge and the myriad of highrise constructions over at the Shenzhen side stretch along the horizon, while on the Deep Bay’s southern shore in the sleepy village of Lau Fau Shan, time seems to have stood still in the past few decades.
Coming all the way to the northwest corner of Hong Kong, we entered the village of Lau Fau Shan and immediately stopped by a small eatery by the main street. Trying the fried or grilled oyster at one of the several simple eateries offers a pleasant alternative to the more upscale seafood restaurants along Lau Fau Shan Main Street.
The special attraction of Lau Fau Shan is indisputably the oysters.
Similar to Sai Kung and Lei Yue Mun, Lau Fau Shan is also well known of its seafood restaurants.
Some seafood restaurants look quite traditional and casual.
There are a few shops in Lau Fau Shan specialized in making oyster sauce. Inevitably oyster sauce has became one of the most popular souvenir of the village.
Along the main street, two workers were busy opening the harvested oysters for sale.
Along the main street, different types of dried seafood were sold.
Near the waterfront, containers and air tubes for live seafood lie all over a temporary covered area.
The waterfront of Lau Fau Shan was covered with oyster shells.
Many boats just lay on mud flats during low tide.
At the waterfront, the shallow water over the mud flats looked like a peaceful mirror. Beyond the Deep Bay stood the silhouette of another metropolis of Southern China, Shenzhen.
From a fishing village before 1980 to today’s metropolis of over 10 million inhabitants, the emergence of Shenzhen is a miracle to many.
While we took pictures of mud flats and Deep Bay, a cyclist emerged from nowhere and stopped for a moment at the waterfront. Beyond lay the 5.5km Hong Kong-Shenzhen Western Corridor (深港西部通道), or the Shenzhen Bay Bridge (深圳灣公路大橋) linking the two cities at the Deep Bay since 2007.
The sun finally appeared behind the clouds, casting an orange tint to the drying seafood by the shore.
In late afternoon, more boats returned from Deep Bay. Some boats arrived at the pier and offloaded passengers who might have spent the entire day fishing in the bay.
The silhouette of Hong Kong Shenzhen Western Corridor (深港西部通道) or Shenzhen Bay Bridge (深圳灣公路大橋) stood out along the western horizon under the late afternoon sun.
Soon enough, the sun made its daily routine down to the horizon beyond the bridge.
As the sun lowered to the horizon, the tide had also quietly returned to the waterfront of Lau Fau Shan.
The moon was already up above Lau Fau Shan. Most tourists had left except a few passionate photographers refusing to leave the waterfront despite the sun was fading fast.
As we left the waterfront of Lau Fau Shan, the lights from the opposite shore began to lit up one by one.