Tuff, a relatively soft, porous rock that is usually formed by the compaction and cementation of volcanic ash or dust. (the italian term tufa is sometimes restricted to the soft, porous, sedimentary rock formed by the chemical deposition of calcite , or calcium carbonate, or silica from water as sinter.). Tuff is basically a volcanic sedimentary rock. as many sedimentary rocks, it is also often layered. the massif central, france. an outcrop of lapilli tuff. it is a remnant of quarried tuff cone. la palma, canary islands. hydrothermally altered tuff (it could be reworked material) in tenerife. gray card for scale (longer edge 9 cm).. During our tuff spot a-z challenge i’ve been thinking about different ways to make our tuff spot more attractive. i know that tuff spot mats can be purchased but they can be expensive and this blog is about finding “play activities that do not cost the earth but will mean the world to your little one.”after the success of our artificial grass mat we used in our easter tuff spot i have.
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