>>>>
>>>17 April 1999 Field Visit -
Hertfordshire
>>>
>>>A double field visit has been
arranged affording opportunities to see an
>>>active quarry and
adjacent landfill, plus an unusual RIGS in a quarry
>>>currently
being transformed into a landfill
site
>>>
>>>
>>>Thames Diverted - Westmill
Quarry, operated by RMC Aggregates (Greater
>>>London)
Limited
>>>, is an active deep sand and gravel quarry to the north
west of Hertford,
>>>where the local Ware Till Ice was considered to
have diverted the course
>of
>>>the proto-Thames. The
active landfill on the adjacent site will also be
>>>open for the
party visit.
>>>
>>>Tunnel Vision - Howell Quarry Near
Hitchen was, until recently, a disused
>>>sand and gravel
quarry. Biffa Waste Services Limited are now carrying
out
>>>site works in preparation for the commencement of
landfilling. Howell's
>>>geological claim to fame is that it
is the RIGS displaying tunnel valley
>>>deposits unique within
Hertfordshire. Palaeocurrent vectors indicate
>>>drainage
up-gradient into the Hitchin-Stevenage
Gap.
>>>
>>>Itinerary - The party will assemble inside
the entrance to Westmill Quarry
>>>at 10am, then remove at circa 12
noon to a local hostelry for light lunch
>>>(at members own
expence), before arriving at Howell Quarry. Travel
will
>be
>>>by personal car. Please would members
provide personal protective
>>equipment
>>>where
possible.
>>>
>>>If wishing to attend please contact
either Martin Isles, Quarry Products
>>>Association Tel:
0171-730-8194 Fax: 0171-730-4355 e-mail
[log in to unmask] or
>>>Peter Thorn,
Johnson Poole & Bloomer Tel: 01384-444-800
Fax:
>01384-444-008
>>>e-mail
[log in to unmask]>>>
>>>The
Environment Group is indebted to Dr Allan Cheshire of the
University
>of
>>>Hertfordshire who has kindly offered to
attend and share his specialist
>>>knowledge of both
sites.
>>>