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Quarterly Journal of Engineering Geology and Hydrogeology
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Quarterly Journal of Engineering Geology and Hydrogeology; 2007; v. 40; issue.2; p. 187-192;
DOI: 10.1144/1470-9236/06-043
© 2007 Geological Society of London

Discussion of ‘Methodology to identify badly weathering limestone using geochemistry: case study on theLower Globigerina Limestone of the Maltese Islands’ byJ. Cassar & A.J. Vella Quarterly Journal of Engineering Geology and Hydrogeology, 36, 85–96

P.A. Gatt1, J. Cassar2 & A.J. Vella3

1 Department of Civil Engineering, University of Malta, Msida, Malta (e-mail: mepcons@hotmail.com)
2 Institute for Masonry and Construction Research, University of Malta, Msida, MSD06, Malta (e-mail: joann.cassar@um.edu.mt)
3 Department of Chemistry, University of Malta, Msida MSD06, Malta (e-mail: alfred.j.vella@um.edu.mt)


Figure 1
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  		Fig. 1 Weathered surface of ‘soll’ type of stone used as masonry in exterior boundary wall (locality: Valletta, Malta) showing differential weathering between burrows and matrix.

 

Figure 2
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  		Fig. 2 Cores from boreholes 1, 2 and 3 in the Lower Member of the Globigerina Limestone Formation. (a) Simplified logs based on Wardell Armstrong (1996); (b) interpretation by the Authors in which facies are claimed to be visually identical.

 

Figure 3
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  		Fig. 3 Cores from boreholes 1, 2 and 3 in the Lower Member of the Globigerina Limestone Formation. (a) Simplified logs based on Wardell Armstrong (1996); (b) explanation by the Authors showing the facies that are actually visually identical.