Unusually among chalks , it is sufficiently strong for use as a building stone .
Unusually among chalks , it has been used as such in these localities , notably in Woburn Abbey , Luton parish church and several smaller local churches .
Unusually among chalks , it is sufficiently strong for use as a building stone , and has been used as such in these localities , notably in Woburn Abbey , Luton parish church and several smaller local churches .