Hooiberg

Geological map
Hooibergiet in flat quartz-diorite landscape.

Type of rock on Hooiberg. a melanocratic diorite.

Despite its name (Dutch: -berg ("mountain")), Hooiberg is more accurately described as a hill rather than a mountain. It's worth noting that Hooiberg is not the tallest geological formation on the island; in fact, that is a common misconception.[6] Jamanota, which stands at 188 m (617 ft), holds that title.[12] Nevertheless, Hooiberg is a prominent natural and cultural landmark in the otherwise flat diorite/tonalite landscape of Aruba. This flat landscape evolved through diorite erosion (denuded) to a relatively low level with an average altitude of 40 m (130 ft) above sea level. In this area numerous pillow-structures consisting of large-rounded diorite blocks are found, namely Casibari and Ayo rock formations.[13] Three distinct hills are preserved by selective erosion in this area; the conical Hooiberg (165m), the Seroe Bientoe (85m), Wara Wara (98m).[12]

Hooiberg is a pluton that consist of a unique, dark-colored (melanocratic) igneous rock known as melanocratic diorite, wich contains minerals such as hornblende, monoclinic pyroxene, plagioclase and quartz.[14] Melanocratic diorite is an intrusive igneous rock that forms from the slow cooling and solidification of magma deep beneath the earth's surface. Melanocratic diorite is not found anywhere else and is therefore aptly named after the Hooiberg hill—Hooibergiet or Hooibergite in Dutch and English, respectively.[13][15][16] The hooibergite is actually older than the surrounding quartz-diorite/tonalite due to the many dikes of aplites and diorites that run through it.[12]

Aruba was likely first sighted by Dutch privateer, Pieter Schouten, on April 24, 1624 during an expedition by the West India Company. The expedition sailed past several islands, including Aruba but did not go ashore. Schouten noted that Aruba had a mountain. "Hooiberg, which he signaled, will always remain a beacon to all seafarers."[17]

Joannes de Laet, a Dutch geographer and director of the Dutch West India Company, describe in his book Beschrijvinghe van West-Indien (1630) that "Aruba... is a sparsely populated land with two small mountains. One of the mountains resembles a sugarloaf and is approximately five miles away. It is inhabited by a few Indians and some Spaniards."[18][19]

David Middleton (1706) described the unfortunate landing of a group of sailors from Captain Sir Michael Geare's ship on Aruba in 1601: "On the 29th of this month (July) we landed on Aruba to fetch fresh water, where seven of our men were killed by the Indians. We lay with our ship half a mile from the shore in 5 fathoms of water. The land protrudes on this side to the north and on the other side to the southeast towards the south; in the middle of the island, from the south, there is a high mountain."[20]

In the early morning hours of October the 13th, 1990, a tragedy struck at Hooiberg. The night before, Aruba experienced extreme weather bringing with it heavy rain, thunder, lightning and flooding. Mr. and Mrs. Frank were in their bedroom when the dog barked as a wave of thunder and lightning hit. This moment prompted Mr. Frank to walk out of the bedroom. At around 3 AM, neighbors heard a loud rumbling noise. They called the local emergency call center, and within minutes, first responders arrived to find a harrowing scene. Mr Frank is covered in mud desperately searching for his wife, who is still inside the half-crushed house. The hazardous environment and extreme weather made it impossible for anyone to search for her. Most bystanders only bore witness to the scene, fearing they might step on her body. It took excavators and tools to finally reach her, whose body was found at 8 AM buried under a pile of mud and a 1.5-meter-wide (~5ft.) boulder. The Frank family had just put their house on the market and had purchased a new home, planning to move soon. The house at Hooiberg 83 was demolished and the plot has been left empty to this day.[21][22][23][24][25][26]

In the past century, Hooiberg was a popular starting point for surveying, and indigenous peoples also used the conical hill as an orientation point and watchtower to survey the sea, as evidenced by the shell artifacts found there. In modern times, the hill has been utilized for different purposes, such as hosting radio and television masts and a navigation light. To facilitate the maintenance of these instruments, a remarkable structure was built in 1951—a concrete staircase with around 900 steps. Despite the innovative idea, few local citizens advocated for its construction. However, architect Eduardo Tromp took the risk and built the high staircase within three months without a blueprint.[2] The result is a remarkable feat of engineering that has become a popular attraction of approximately 587 (2022) steps and has undergone multiple reconstructions and upkeep.[27][28]

The Hooiberg and Aloe vera were officially adopted as emblems on the coat of arms on November 15, 1955. The upper right quadrant, positioned next to the Aloe vera, depicts Hooiberg in green, representing Aruba rising from the barry (blazon: patterns of horizontal stripes of altering color) wavy sea. The elevation of Hooiberg on the shield symbolizes the island's history of food crop cultivation. Hooiberg is part of a triangle of peaks, including Seroe Biento and Cero Canashito that form a watershed area at their base. The locale has always been one of the most reliable agricultural areas on the island.[29]

Initiatives were taken in the area of Canashito (Santa Cruz) in 1830 to stimulate settlement and agriculture production. They successfully cultivated crops, fruit, and seed-bearing trees on 2 hectares (4.9 acres) of land.[30] Hooiberg’s favorable condition made it suitable for agriculture, unlike most parts of the island, including Jamanota, which were generally unreliable for cultivation.[31][32]

Aerial view of cultivation practices around 1. Hooiberg 2. Canashito 3. Seroe Biento (1947). Agricultural fields of aloe and small corn.

Soil Poteniality Map of Aruba (1966). Suitable soil for rain-dependent agriculture under special conditions around Hooiberg and Canashito.

West. Aruba. Aloe field with Hooiberg on the horizon.

Aruba. Harvesting and leaking aloe.

The aloe industry is recognized as Aruba’s most important industry due to the history of resource exploitation that had a substantial impact on the landscape.[30] Since the arrival of Spanish colonization, the landscape in Aruba underwent fundamental changes, including deforestation and the introduction of free-roaming herds that graze on the land.[33]

Aloe vera was introduced to Aruba in 1840 and became a major producer and exporter of the plant known for its high quality due to high levels of aloin. Aloe cultivation was predominantly located in southwest coastal areas, particularly on limestone terraces. The deforestation of dyewood (Haematoxylum brasiletto) a century earlier may have contributed to the liming (calcium-rich soil), provided the ideal conditions for aloe to thrive.[34] By 1911, agricultural activities covered nearly the entire central part of Aruba, particularly on the quartz-diorite landscape.[35] In 1912, Aruba exported 375,000 kilograms (827,000 pounds) of aloe vera, compared to 920 kilograms (2,030 pounds) from Curaçao and 31,000 kilograms (68,000 pounds) from Bonaire.[36]

In the 18th century, peanuts imported from Curaçao by the Dutch West India Company were brought to Aruba, where they grew into an important industry. The difference in soil made Aruba for a long time the “peanut island”. Peanut-growing became a favored means of livelihood in areas such as Hooiberg, including Noord and near Seroe Cristal.[37]