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tufa
Tufa is a specialized term used primarily in geology, archaeology, and architecture. It describes a specific type of limestone that is characterized by its high porosity and lightness, which makes it distinct from denser limestones or marbles.
In a geological context, it refers to the active process of calcium carbonate precipitating out of water, often creating organic-looking towers or crusts around springs and lakes. In an architectural or historical context, it refers to the resulting stone used as a building material, particularly in Roman construction.
As a material, tufa is typically treated as an uncountable noun (e.g., "The wall is made of tufa"). However, it can be used as a countable noun when referring to specific formations or types of the rock (e.g., "various tufas were identified in the region").
Ý nghĩa
Ví dụ
The lake shore is lined with towering tufa formations.
Ancient Romans often used tufa for the foundations of their buildings.
Look at how the water precipitates calcium carbonate to create this tufa.
The sculpture was carved from a soft block of volcanic tufa.
I wonder if this porous tufa rock was formed over thousands of years.
Tufa deposits are common in alkaline lake environments.
The walls of the old cellar are made of rough tufa stone.
We can see the distinct layers of tufa along the spring edge.