7 Geology and Hydrogeology
7.11 References
The following
references have also been consulted:
- B J Murphy
& Associates, " N9 Thomastown By-Pass - Geological Report.
1997.
- Soil National
Survey of Ireland, Soils of County Carlow, 1970.
- Brian P. Connor
& Associates Ltd, "Preliminary report on the impact of proposed
Thomastown By-Pass on underlying and adjacent aquifers".
1997.
- G.R.Wright,
" The Mid-Kildare Gravel Aquifer", Groundwater Section,
Geological Survey of Ireland, 1988.
- Geological
Survey of Ireland, Bedrock Geology memoirs, Geology of Carlow-Wexford.
- Hanrahan,
E.T, " Irish Glacial Till: Origin and Characteristics",
Oighear-Thalamh Eireann, 1977.
- Burdon, D.J.,
"Some Ancient Dolines in the Karst of Ireland", 2nd Multidisciplinary
Conference on Sinkholes and the Environmental Impacts of
Karst, Orlando, 1987.
- B.J. Murphy
& Asssociates, "Geotechnical Report (Final), Desk Study,
Walkover Survey and Reconnaissance Geophysical Survey, Proposed
Carlow Eastern By-Pass", January 2000.
Table 7.1
: Geological formations occurring in the study area.
| Period |
Formation |
Rock
Types |
Excavatability |
Cutting
Stability |
Map
Symbol (where used) |
| Silurian |
Carrighill
|
Greywackes,
siltstones and shales |
Generally
rippable |
Can
be highly faulted and folded leading to stability problems |
|
|
Tipperkevin
|
Greywackes
and shales |
Generally
rippable |
As
above |
|
| Carboniferous |
Ballymartin
|
Interbedded
muddy limestone and shaly mudstone |
Generally
rippable |
Generally
stable |
|
|
Ballysteen
|
Muddy
limestone |
Generally
rippable |
Generally
stable |
|
|
Butlersgrove
|
Argillaceous
limestone occasionally |
Generally
rippable |
Generally
stable |
|
|
Milford
|
Calcarenitic
Limstone/Dolomitised |
Generally
rippable |
Generally
stable |
|
|
Ballyadams
|
Shelf
Limestone, potentially Karstic |
Generally
rippable, may prove hard to excavate where the rock is
massive |
Stable
except for karstified zones |
Rck-3 |
|
Clogrenan
|
Shelf
Limestone, potentially Karstic |
Generally
rippable |
As
above |
Rck-3 |
|
Quinagh
|
Lenticular
mudstone and coarse siltstone |
Generally
rippable |
Generally
stable |
|
Note:
The geological formations within the Castlecomer plateau have
not been addressed because the plateau area has been excluded
from the study area.
Table 7.2
: Typical Soil Properties
| Soil
Type |
Strength |
Compressibility
|
Use as
Earthworks |
| Gravel |
Good |
Low |
Good |
| Glacial
Till |
Variable |
Low-medium |
Variable |
| Peat |
Very
poor |
Very
high |
Not suitable |
| Alluvium |
Poor |
High |
Poor |
Table 7.3
: List of Pits, Quarries and Landfill Sites
A : Pits
|
Location
|
Number1
|
Nearest
Significant Town
|
|
Dunmore
pit, Dunmore, Co. Kilkenny
|
/
|
Kilkenny
|
|
Kildavin
Pit, Kildavin, Co. Carlow
|
/
|
Kildavin
|
|
Liam
Conway and Sons Ltd., Kildavin, Co. Carlow
|
/
|
Kildavin
|
|
Farrell's
pit
|
Q87
|
Naas
|
|
Hempstown
Commons pit
|
Q88
|
Kilcullen
|
|
Kilsaran
Concrete LTD
|
Q89
|
Kilcullen
|
|
Lowtown
Quarry
|
Q90
|
Lowtown
|
|
The
Quarry Kilmeague
|
Q91
|
Naas/Newbridge
|
|
Walshestown
pit
|
Q92
|
Naas
|
B : Quarries
|
Location
|
Number1
|
Nearest
Significant Town
|
|
Ballyellen
Limestone Flour Works
|
Q1
|
Goresbridge
|
|
Clogrennane
Quarry
|
Q2
|
Carlow
|
|
James
Walsh Quarry
|
Q3
|
Leighlin
Bridge
|
|
Dan
Morrissey
|
|
Milford
|
|
Gotham
|
|
Castledermot
|
|
Allen
Quarry
|
Q86
|
Naas
|
|
Kellymount
Quarry
|
Q96
|
Kilkenny
|
|
Ormonde
Brick Shale
|
Q98
|
Castlecomer
|
|
Threecastles
Quarry
|
Q100
|
Killaree
|
|
Campion's
Quarry
|
Q102
|
Rathdowney
|
|
Carroll
Quarry
|
Q103
|
Portlaois
|
|
Ballyadams
Quarry
|
Q101
|
Ballintubbert
|
C : Landfill
Sites
|
Facility
Location
|
Status
|
|
Arthurstown,
Kill, Co. Kildare
|
Licensed
|
|
Silliot
Hill Landfill, Silliot Hill and Brownstown, Co. Kildare
|
Pre-PD2
|
|
Powerstown,
Carlow
|
Licensed
|
|
Clonsough,
Kyleclonhobert, Co. Laois
|
Licensed
|
|
Dunmore,
Co. Kilkenny
|
Licensed
|
|
Ballylinan
Landfill site, Ballylinan, Co. Laois
|
Licensed
|
|
KTK
Pit, Brownstown & Carnalway, Kilcullen, Co. Kildare
|
Licensed
|
|
The
Lands, Pollardstown, The Curragh, Co. Kildare
|
Pre-PD2
|
Notes :
- Number as
shown on the Geotechnical Constraints maps (Drawings 00229/022
to 00229/024)
- Application
in process, no decision yet.
Table 7.4
: Mineral resources
| Location |
Minerals |
Comments |
| Galmoy,
Co. Kilkenny |
Lead
and Zinc |
Active
mine |
| Rossmore,
Co. Laois |
Coal |
Inactive |
| Coolbaun,
Co. Laois |
Coal |
Mining
lease issued |
| Harberton
Bridge, Co. Kildare |
Lead
and Zinc |
Undeveloped
metal deposit |
| Ardra,Castlecomer,
Co.Kilkenny |
Brick
clay |
Brick
manufacture |
|
