Chiltern Society Photos

1 second 2 seconds 3 seconds 4 seconds 5 seconds 6 seconds 7 seconds 8 seconds 9 seconds 10 seconds 11 seconds 12 seconds 13 seconds 14 seconds 15 seconds 20 seconds delay, loading photo...          Northern end of Quarry 3 showing the "benches" - worked levels in the chalk face. The chalk quality of individual levels was known so, following laboratory analysis, material from specific benches was ordered to keep the cement quality constant. The benches were square cut allowing for long-term erosion to create a slope of 60 degrees.  Author: J Harrison,