 The Medway long barrows all conformed to the same general design plan , and are all aligned on an east to west axis . Each had a stone chamber at the eastern end of the mound , and they each probably had a stone facade flanking the entrance . The chambers were constructed from sarsen , a dense , hard , and durable stone that occurs naturally throughout Kent , having formed out of silicified sand from the Eocene . Early Neolithic builders would have selected blocks from the local area , and then transported them to the site of the monument to be erected . 
 The Medway long barrows all conformed to the same general design plan , and are all aligned on an east to west axis . Each had a stone chamber at the eastern end of the mound , and they each probably had a stone facade flanking the entrance . The chambers <a href='uninflect' title='1'><mark>were</mark></a> constructed from sarsen , a dense , hard , and durable stone <a href='null_relcl' title='2'><mark>that</mark></a><a href='uninflect' title='3'><mark>occurs</mark></a> naturally throughout Kent , <a href='been_done' title='4'><mark>having</mark></a> formed out of silicified sand from the Eocene . Early Neolithic builders would <a href='been_done' title='5'><mark>have</mark></a> selected blocks from the local area , and then transported them to the site of the monument to be erected . 
The Medway long barrows alll conformed to da same general design plan , and r all aligned on an east to west axis . Each had a stone chamber at tdaeastern end of thdaound , and they each deff had a stone facade flanking the entrance . The chambers was constructed from sarsen , a dense , hard , and durable stone occur naturally throughout Kent , done formed out of silicified sand from thedacene . Early Neolithic builders would done selected blocks from the daal area , and then transported them to the sda of the modaent to be erected .