The shingle They are known as pebbles and chinarros. These are fragments of rocks that are rounded and are usually found in places near rivers and beaches. These rock fragments have been used throughout history and currently for various activities.
In this article we are going to tell you what pebbles are, what their characteristics are and what uses they have.
Pebbles, what are they?
Pebbles are smooth, rounded rock fragments commonly found in river beds, beaches, and areas with river activity. Also It is known as pebbles.. These small pieces of rock are the result of natural processes that act on the larger stones, wearing and polishing them over time.
The formation of pebbles begins with the action of factors such as water and wind. The constant flow of water in rivers and streams carries larger particles of sediment and stones with it. As these stones collide with each other and are carried by the current, an abrasion process occurs that gradually gives them a round shape and smoothes their edges.
The composition of the pebbles can vary depending on the geographical region, as it depends on the types of rocks present in the area. Can be of sedimentary, igneous or metamorphic origin, reflecting the geological diversity of the environment. Additionally, the coloration of pebbles often reveals information about the mineral composition of the parent rocks.
These small rock fragments are not only interesting geomorphological elements, but also play an important role in the ecosystem. Pebbles provide unique habitats for various organisms, as the cracks and gaps between them They can host small plants, insects and other microorganisms. Furthermore, the presence of pebbles in river beds and beaches contributes to the modulation of coastal and river erosion.
How pebbles are formed
The pebble formation process is a geological process that involves a series of natural forces and physical changes over time. After larger rocks are fragmented by the action of water and other erosive agents, the abrasion phase begins, which is crucial in the rock transformation to give the pebbles their characteristic round shape and soften their edges.
Abrasion occurs when rocks collide and rub against each other due to water current, wind or even wave action in the case of beaches. This constant rubbing eliminates the edges and protuberances of the rocks, gradually wearing them down. As the process continues, The pebbles undergo a physical transformation, adopting a smooth texture and a rounder shape.
The speed of the pebble formation process can depend on several factors, such as the strength of the water flow, the mineral composition of the parent rocks, and the duration of exposure to erosive agents. In some cases, this process can take thousands or even millions of years, evidencing nature's relentless patience in creating these geological elements.
Pebble formation is not limited to just rivers and beaches. It can also occur in desert areas, where wind action plays a significant role in the weathering of rocks. Additionally, sediment accumulation and geological pressure may contribute to the rounding and polishing of stones in other geographic contexts.
Uses of pebbles
Uses of past tense
Slingers often opted for pebbles as their weapon of choice when throwing. Since ancient times, pebbles have played a role in children's recreational activities. One of the most beloved games, known as “ripple making,” involves the act of throwing and sliding smooth stones over a liquid surface. For a brief moment, the surface tension of the water prevents the pebbles from submerging.
During World War II, Allied bombers They employed a water ricochet technique to effectively target enemy rivers and dams with their bombs.
In ancient times, a technique known as cosmatesco involved the abundant use of small pebbles called chinas or chinarros, with slightly larger ones also being used. These pebbles were skillfully arranged to create artistic floors, with circular designs, intricate rope patterns and other geometric artistic elements. This technique can still be observed in numerous rural churches in northern Spain. Likewise, in the southern region of Spain, The Muslims of Granada used a similar technique known as Granada cobblestone. In this case, white pebbles were usually chosen to create a striking contrast to the darker ones.
Uses today
In the field of construction, these tiles are commonly used to create plasters and pavements, such as the renowned Cosmatesco technique or the Granada pavement. Their flat edges offer great utility for stacking materials, while their strong bond with concrete or cement makes them very advantageous.
The exceptional qualities and remarkable durability of pebbles make them an ideal choice for construction purposes. It is widely used in the construction of pavements of roads, railways and ballasts, where concrete derived from boulders offers incomparable resistance.
By subjecting it to a chemical and thermal treatment, its resistance and qualities can be significantly enhanced. Its composition and shape make it ideal for creating storage areas for materials. Furthermore, its exceptional ability to adhere to cement is notable.
Gardening benefits greatly from the use of garden pebbles. These pebbles have a dual purpose: They add a decorative touch and at the same time protect the soil and plants against sudden temperature fluctuations. In addition, they effectively retain the necessary moisture in the soil.
Interior and exterior design has experienced significant advances in the field of architecture. Incorporating boulder walking circuits into spas is becoming increasingly popular for its fantastic health benefits, especially in improving blood circulation.
I hope that with this information you can learn more about what pebbles are, their characteristics and uses.