1. 
   siltstone
   [n] - a fine-grained sandstone of consolidated silt
   Found op http://www.webdictionary.co.uk/definition.php?query=siltstone
   
   
2. 
   siltstone
   noun a fine-grained sandstone of consolidated silt
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=siltstone
   
   
3. 
   siltstone
   hardened sedimentary rock that is composed primarily of angular silt-sized particles (0.0039 to 0.063 mm [0.00015 to 0.0025 inch] in diameter) and is ... [2 related articles]
   Found op http://www.britannica.com/eb/a-z/s/95
   
   
4. 
   Siltstone
   Siltstone is a sedimentary rock which has a grain size in the silt range, finer than sandstone and coarser than claystones. == Description == Siltstone is a clastic sedimentary rock. As its name implies, it is primarily composed (greater than 2/3) of silt sized particles, defined as grains 1/16 - 1...
   Found op http://en.wikipedia.org/wiki/Siltstone
   
   
5. 
   Siltstone
   Fine grained sedimentary rock composed of lithified silt particles.
   Found op http://www.physicalgeography.net/physgeoglos/s.html
   
   
6. 
   siltstone
   1) A fine-grained sandstone of consolidated silt 2) Sandstone
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/siltstone/1
   
   

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