Not quite. Limestone can be quite hard but in any case mechanical erosion is a secondary process consequent upon a sufficiently large conduit forming first.
The primary process is the dissolution of limestone (strictly speaking the calcium carbonate that is its main constituent) by water slightly acidified by absorbing atmospheric carbon dioxide.
The water finds its way through the rock formation by following the tension-cracks, bedding-planes and other discontinuities from sink to rising (spring).
And the term used throughout the English-speaking world is "caving" not "spelunking", which I have heard is actually derisory slang in the US for novice or dilettante cavers. I've mentioned this a few times on Answers by now!
Acidic ground water (rain-water that has absorbed atmospheric carbon dioxide to form carbonic acid) dissolving the limestone as it flows through the joints & other discontinuities in the rock mass.
Chemical weathering
Weathering from mechanical and chemical means is the process that causes rocks to become smaller and smaller; wind, rain, the sun, the freeze/thaw cycle, moving glaciers, chemical reactions, and gravity are some of the causes of weathering.
acid rain causes the marbel statues to arode
It causes chemical weathering because when it touches rocks, the rocks dissolve, forming caves.
acid
In chemical weathering, there is a chemical reaction that causes weathering. Mechanical weathering is caused by fire, abrasions of water along a surface, animals, or freezing and thawing.
Groundwater dissolves limestone, which causes sinkholes to form
what chemical weathering called oxidation causes
Groundwater causes chemical weathering by speeding reactions between reactive materials. Typical would be an oxidizing reaction, such as the formation of rust in rocks containing iron, or the dissolution of limestone by carbonic acid.
Oxygen is the major gas that is the cause chemical weathering.
Physical, chemical and biological change are the three main causes of weathering.
Chemical weathering causes a face to form on a cliff.
Chemical weathering
Chemical weathering
Chemical weathering
Weathering from mechanical and chemical means is the process that causes rocks to become smaller and smaller; wind, rain, the sun, the freeze/thaw cycle, moving glaciers, chemical reactions, and gravity are some of the causes of weathering.
Chemical weathering is caused by chemical reactions in the substance, for example, when oxidation causes rusting.