Stratigraphy and Correlation of the Chalk Group Seen in the Berkshire

British Geological Survey NATIJRU ENVIRONMENT RESEARCH COUNCIL

Stratigraphy and Correlation of the Chalk Group seen in the Berkshire Downs LOCAR boreholes Integrated Geoscience Surveys (Southern England) Programme Internal Report IR/03/035

BRITISH GEOLOGICAL SURVEY

INTERNAL REPORT IR/03/035

Stratigraphy and Correlation of the Chalk Group seen in the Berkshire Downs LOCAR boreholes

M A Woods

The National Grid and other Ordnance Survey data are used with the permission of the Controller of Her Majesty's Stationery Office. Ordnance Survey licence number GD 27219111999

Key words

Chalk Group, Correlation, Berkshire Downs, Upper Cretaceous, Lithostratigraphy, Biostratigraphy.

Bibliographical reference

WOODS,M A. 2003. Stratigraphy and Correlation of the Chalk Group seen in the Berkshire Downs LOCAR boreholes. British Geological Survey Internal Report, IR103/035. 10 PP. a 0 NERC 2003 Keyworth, Nottingham British Geological Survey 2003 BRITISH GEOLOGICAL SURVEY The full range of Survey publications is available from the BGS Keyworth, Nottingham NG12 5GG Sales Desks at Nottingham and Edinburgh; see contact details p 01 15-936 3241 Fax 01 15-936 3488 below or shop online at www.thebgs.co.uk e-mail: [email protected] The London Information Office maintains a reference collection www.bgs.ac.uk of BGS publications including maps for consultation. Shop online at: www.thebgs.co.uk The Survey publishes an annual catalogue of its maps and other publications; this catalogue is available from any of the BGS Sales Murehison House, West Mains Road, Edinburgh EH9 3LA Desks. 4 0131-667 1000 Fax 0 131-668 2683 e-mail: [email protected] The British Geological Survey carries out the geological survey of Great Britain and Northern Ireland (the latter as an agency service for the government of Northern Ireland), and of the London Information Office at the Natural History Museum surrounding continental shelf; as well as its basic research (Earth Galleries), Exhibition Road, South Kensington, London projects. It also undertakes programmes of British technical aid in SW7 2DE geology in developing countries as arranged by the Department 4 020-7589 4090 Fax 020-7584 8270 for International Development and other agencies. 4 020-7942 5344145 email: [email protected] The British Geological Survey is a component body of the Natural Environment Research Council. Forde House, Park Fie Business Centre, Harrier Way, Sowton, Exeter, Devon EX2 7HU 4 01392-445271 Fax 01392-445371

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Parent Body Natural Environment Research Council, Polaris House, North Star Avenue, Swindon, Witshire SN2 1EU ' 4 01793-411500 Fax 01793-411501 www.nerc.ac.uk XX/W%& Draft 0.1 Last modified: 2003102124 16:28

Foreword

This report summarises the stratigraphical details and correlation of six cored boreholes drilled in • the Chalk Group of the Berkshire Downs as part of the LOCAR (Lowland Catchment Research) project.

Acknowledgements

D K Buckley (BGS Wallingford) kindly supplied copies of geophysical logs detailed in this report. - - -- -

XX/00/00; Draft 0.1 Last modified: 2003102l24 16:28

Contents

Foreword ...... i Acknowledgements ...... i .. Contents...... 11 ... Summary ...... 111 1 Introduction ...... 4 2 Criteria for correlation ...... 4 2.1 Geophysical criteria ...... 4 . . 2.2 Lithological cntena ...... 5 2.3 Faunal criteria ...... 5 3 Interpretation ...... 5 3.1 New Pit Chalk Formation ...... 6 3.2 Lewes Nodular Chalk Formation ...... 6 3.3 Seaford Chalk Formation ...... 7 3.4 Frogmore Farm and Grimsby Wood boreholes ...... 8 4 Conclusions ...... 8 Appendix 1 - author citations for fossil species ...... 9 References ...... 10

FIGURES

Figure 1 Location of the cored LOCAR boreholes and the Banterwick Barn No. 2 Borehole in the Berkshire Downs Figure 2 The correlation and lithostratigraphical interpretation of the main cored LOCAR boreholes. Figure 3 Lithological log of the Boxford (cored) Borehole [SU 428 7251. Figure 4 Lithological log of the Grimsby Wood (cored) Borehole [SU 514 7191. Figure 5 Lithological log of the Trurnpletts Fann (cored) Borehole [SU 5 13 75 11. Figure 6 Lithological log of the Frilsham Meadow (cored) Borehole [SU 538 7391. Figure 7 Lithological log of the Broadfield Cottages (cored) Borehole [SU 549 7491. Figure 8 Lithological log of the Frogmore Farm (cored) Borehole [SU 586 7191. XX/OOIW, Draft 0.1 Last modified: 2003102124 16:28 Summary

Six cored boreholes drilled in the Chalk Group of the Berkshire Downs as part of the LOCAR (Lowland Catchment Research ) Project show a stratigraphical range fiom the upper New Pit Chalk Formation to the upper Seaford Chalk Formation. A combination of lithological, geophysical and macrofossil criteria can be used to correlate the successions. These correlations show that the top of the Lewes Nodular Chalk is diachronous, but below the correlative horizon of Shoreham Marl 2, which marks the top of the Lewes Nodular Chalk in Sussex. There is some evidence to suggest that the chalk found in the Boxford Borehole may have been affected by shearing. XX/00/00;Draft 0.1 Last modified: 2003/02/2416:28

1 Introduction

During the summer and autumn of 2002 a suite of boreholes was drilled and geophysically • logged in the Chalk Group of the Berkshire Downs as part of the LOCAR (Lowland Catchment Research) Project. Six of these boreholes were also cored and lithologically logged, and it is the stratigraphy of these that is discussed herein. The boreholes are:

Tnunpletts Farm (PL 10) [SU513751] SU57NE72* Frilsham Meadow (PL 11 E) [SU 538 7391 SU57SW104* Broadfield Cottages (PL 13A) [SU 549 7491 SU57SW112* Boxford (PL26G) [SU 428 7251 SU47SW191* Grimsby Wood (PL14B)** [SU 514 7191 SU57SW114* Frogmore Farm (PL02) [SU586719] SU57SE198*

(*: BGS borehole index number appearing in SOB1 (Single Onshore Borehole Index)) (**: borehole also cored Tertiary strata between 13.85 m and 30.0 m depth)

The boreholes are confined to a relatively small geographical area and, with the exception of the Boxford Borehole, form a cluster in the south-westem diagonal half of grid square SU57 (Figure 1). The BGS Banterwick Barn No. 2 (cored) Borehole [ SU 5134 77501 also falls within this vicinity, and is a key reference point for the interpretation and correlation of the above borehole successions (Figure 2). The detailed lithological-logsof the boreholes are shown in Figs 3 to 8. In this report, the term 'marl' means clay-rich chalk. Author citations for fossil species are detailed in Appendix 1.

2 Criteria for correlation

Correlation of the boreholes is based on geophysical, lithological and macro-fossil evidence. For each of these data types, particular criteria were used to establish correlations between the successions. These are discussed in turn below.

2.1 GEOPHYSICAL CRITERIA

Borehole resistivity logs have proved valuable in the recognition of Chalk Group formations and marker-beds (e.g. Mortimore, 1986). This technique has previously been described with respect to the correlation of Chalk Group successions in the Berkshire Downs (Woods, 2001), and is not 0 reiterated in detail herein. For the boreholes examined in this study, the key criteria for establishing a correlation were: XX/00/00;Draft 0.1 Last modified: 2003/02/24 16:28 a Recognition of the sharp low resistivity peak equating with the higher of two marker marls seen in the Banterwick Barn No. 2 Borehole (seen near the base of the Broadfield Cottages Borehole & labelled 'A' on Fig. 2). Recognition of the sharp low resistivity peak corresponding to the Fognam Marl Recognition of the sharp high resistivity peak equating with the hardgrounds and indurated chalk that comprise the 'Chalk Rock'.

b Recognition of a group of 4 low resistivity peaks labelled 'B' on Fig. 2. Recognition of a group of 4 low resistivity peaks labelled 'C' on Fig. 2.

2.2 LITHOLOGICAL CRITERIA

The boreholes examined in this study can be characterised by five main lithological features: b The occurrence of very frequent and relatively thick marl seams (only seen in the lower part of the Trumpletts Farm Borehole; Fig. 2). The occurrence of beds of intensely hard chalk and hardgrounds (seen in core from Trumpletts Farm, Broadfield Cottages and the Boxford Borehole; Fig. 2). The occurrence of hard, nodular, rough-textured chalk (seen in all of the boreholes, and indicated by pink shading on Fig. 2). The occurrence of chalk with very few marl seams in the upper part of the Trumpletts Farm, Broadfield Cottages, Frilsham Meadow and Boxford boreholes. b The occurrence of spongiferous chalk in the upper part of the Trumpletts Farm and Broadfield Cottages boreholes.

2.3 FAUNAL CRITERIA

Three main faunal criteria can be used to correlate the above borehole successions: b The total range of Platyceramus. .The total range of Volviceramus (including K involutus). b The total range of Cremnoceramus.

Additionally, the occurrence of Micraster normanniae in the Trumpletts Farm and Broadfield Cottages boreholes assisted in correlating these successions.

3 Interpretation

Combining the above criteria allows the borehole successions at Trumpletts Farm, Broadfield Cottages, Frilsham Meadow and Boxford to be correlated and lithostratigraphically interpreted (Fig. 2). The stratigraphical range of these boreholes is from the upper New Pit Chalk Formation to the upper Seaford Chalk Formation. The interpretation of the Grimsby Wood and Frogmore Farm boreholes is discussed separately (3.4 below). XX/00/00:Drab 0.1 Last modified: 2003/02/2416:28 a

3.1 NEW PIT CHALK FORMATION

The New Pit Chalk Formation is typically moderately weak chalk with common marl seams and sparse flint nodules. The only borehole core that samples this formation is in the basal part of the Trumpletts Farm succession. However, this interval can also be recognised in the basal part of the geophysical log for the Broadfields Cottages Borehole, which contains a marker ('A' on Fig. 2) that can be correlated with the New Pit Chalk in the Banterwick Barn Borehole. The lowermost part of the geophysical log for the Frilsham Meadow Borehole may also penetrate the top of the New Pit Chalk.

3.2 LEWES NODULAR CHALK FORMATION

The Lewes Nodular Chalk Formation is typically hard, nodular chalk with common flints. In the Berkshire Downs, the basal interval is characterised by a suite of hardgrounds and very indurated chalk ('Chalk Rock'), which is easily recognised in borehole core and on geophysical logs (Fig. 2). However, in the Trumpletts Farm Borehole, there appears to be a thicker interval of hard, nodular chalk below the 'Chalk Rock' than seen in the Banterwick Barn Borehole (Fig. 2; Woods & Aldiss, in prep.). In the Berkshire Downs, the top of the Lewes Nodular Chalk is rather gradational, and difficult to recognise. Previous borehole correlations suggested that a pronounced inflection in the resistivity log could be used to infer the top of nodular chalk facies, and thus the top of the Lewes Nodular Chalk Formation (Woods, 2001). Work on the Banterwick Barn No. 2 Borehole (Woods & Aldiss, in prep.) showed that the top of the Lewes Nodular Chalk in that succession, as defined by lithology and by geophysical signature, is below the horizon of Shoreham Marl 2 which marks the top of the Lewes Nodular Chalk in the Sussex stratotype succession (Mortimore, 1986). Correlation of the LOCAR boreholes has added to the information about how the top of the Lewes Nodular Chalk is developed in the Berkshire Downs. The following are the key points relating to the Trumpletts Farm, Broadfield Cottages, Frilsham Meadow and Boxford boreholes: F The geophysical inflection inferred to represent the horizon of the Shoreham Marl 2 in the Banterwick Barn Borehole can be correlated through the boreholes (Fig. 2). This horizon is the lowest of a set of four geophysical markers ('B' on Fig. 2) that can be used to correlate the boreholes. F The top of the Lewes Nodular Chalk defined by the development of nodular facies in the borehole core is diachronous, but below the marker representing Shoreham Marl 2. However, the top of nodular chalk facies is almost coincident with the inferred horizon of Shoreham Marl 2 in the Broadfield Cottages Borehole. F A pronounced geophysical inflection that, in the absence of other data, might be used to recognise the top of the Lewes Nodular Chalk, is present in the boreholes (labelled and marked in blue on Fig. 2). This inflection is simply picked at a conspicuous change in the borehole resistivity log signature, and is not intended to represent the same stratigraphical level in each borehole. This inflection is approximately coincident with the top of nodular chalk facies in the Trumpletts Farm, Broadfield Cottages and Boxford boreholes, but is below the top of nodular chalk facies in the Frilsham Meadow Borehole. XX100100; Draft 0.1 Last modified: 2003102124 16:28

Within the Lewes Nodular Chalk, the horizon of the Fognam Marl (= Southerham Marl 2 of Gale, 1996) can be identified in the core of the Trumpletts Farm Borehole, and recognised in the geophysical logs of the Broadfield Cottages and Frilsham Meadow Borehole. In the Trumpletts core, this marl has the typical thick, plastic texture and abundance of Labyrinthidoma (= Coskinophragma of Mortimore, 1986) that is distinctive of the Fognam Marl 1 Southerham Marl 2. Slightly higher in the Trumpletts Borehole succession, an acme of Cremnoceramus ex gr. walterdoflensis, associated with a closely spaced marl pair in strongly indurated chalk is suggestive of the paired Navigation Marls and associated Navigation Hardground. This horizon marks the approximate position of the Turonian I Coniacian boundary in the succession.

3.3 SEAFORD CHALK FORMATION

The higher part of the successions in the Trumpletts Farm, Broadfield Cottages, Frilsham Meadow and Boxford boreholes is inferred to belong wholly to the Seaford Chalk Formation. However, as already discussed, the basal part of this interval in these boreholes, falling below the inferred horizon of Shoreham Marl 2 (Fig. 2), actually equates with the higher part of the Lewes Nodular Chalk Formation in Sussex. Common marl seams, Volviceramus and Platyceramus, seen in all of the aforementioned boreholes, can be equated with the lower part of the Seaford Chalk in the type Sussex succession. However, lack of macrofossils fiom the higher part of these successions makes formational assignment less certain. The Frilsham Meadow Borehole is close to a chalk pit [SU 5 134 77501 which showed Cladoceramus undulatoplicatus, indicative of the middle part of the Seaford Chalk (and the Coniacian I Santonian boundary), just below the contact with Tertiary strata (Woods, 2000). C. undulatoplicatus also possibly occurs in an old chalk pit near Trumpletts Farm [SU 5089 74981 (Woods, 2000). If this is also the approximate horizon of the top of the Frilsham Meadow and Trumpletts Farm boreholes, then based on the borehole correlation shown in Fig 2, there is only likely to be a further 20 m or so of stratigraphically younger strata present in the Broadfield Cottages and Boxford boreholes, making assignment to the Seaford Chalk seem reasonable. However, faunal evidence fiom the Faircross Borehole [SU 6972 63221 shows that the higher part of the Seaford Chalk is locally condensed, raising the possibility that at least ihe top of the Broadfield Cottages succession might include the basal Newhaven Chalk. This question could be resolved by examination of micro-fossil samples from this interval.

In the Boxford Borehole, there is implied expansion of the interval between the 'Chalk Rock' and the base of the group of geophysical markers in the Seaford Chalk labelled 'B' on Fig. 2. This is based on the core and partial correlation of the geophysical log with adjacent boreholes. Extensive core loss in the lower part of the Boxford Borehole means that fixing the precise horizon of the 'Chalk Rock' is problematic. This could be resolved if the Boxford resistivity log extended lower in the succession, but obstructions in the borehole mean that this is not possible at present (D K Buckley, pers. comm., 2003). If expansion is present in this interval, then a sedimentary or structural cause (or combination of the two) seems most likely. Interestingly, there is a pronounced high gamma peak around 50 m depth on the geophysical log for the Boxford Borehole. The coincidence of this peak with a pronounced low value peak on the resistivity log for this borehole might suggest a marl-rich interval. This is the case for a similar peak at 28m depth, but the only marl in the core around 50 m depth is a 20 rnm thick seam at 49.35 m. However, the core at 50 m depth is highly fragmented, and conspicuously stained with iron. These features may explain the geophysical signatures, and could be caused by a fault zone or shear horizon. Sheared and slumped strata are known to locally occur in the Seaford Chalk at outcrop in the nearby Boxford Pit [SU 431 7191, locally causing inversion of the succession (Mortimore et al., 2001). Prounounced faulting in the succession might also explain the very poor core recovery from the Boxford Borehole. XX/00/00;DratlO.l Last modified: 2003IOU24 16:28

A final point of interest in the borehole correlation is the presence of a bed of hard, rough- a textured chalk at c. 21 m depth in the Broadfield Cottages Borehole. This horizon is marked by a high value peak on the resistivity log, and it is tempting to speculate that this is equivalent to a hard bed locally mapped in the higher part of the Seaford Chalk in the Berkshire Downs.

3.4 FROGMORE FARM AND GRIMSBY WOOD BOREHOLES

Relatively short intervals were cored in these two boreholes. Neither has any distinctive lithological of faunal characteristics, and for this reason they are considered separately fkom the previous boreholes. The moderately weak to moderately strong, flinty chalk seen in the two boreholes is consistent with assignment to the Seaford Chalk Formation, and the sparsity of fauna compares with the higher part of the Seaford Chalk seen in the cores of the Trumpletts Farm, Broadfield Cottages, Frilsham Meadow and Boxford boreholes. The Grimsby Wood Borehole, in which Tertiary strata occur to a depth of at least 30 m, is also relatively close to an old chalk pit [SU 5396 72921 where the highest chalk seen below the Palaeogene contact belongs to the middle Seaford Chalk (Woods, 2000).

4 Conclusions

The LOCAR cored boreholes can be correlated using a combination of geophysical, lithological and macro-fossil criteria. These correlations show that the succession in the boreholes ranges • fi-om the upper New Pit Chalk Formation to the upper Seaford Chalk Formation. The top of the Lewes Nodular Chalk is diachronous, but generally below the inferred horizon of the Shoreham Marl 2. In the Frilsham Meadow Borehole, there is some discrepency between what might have been assumed to be the geophysically defined top of the Lewes Nodular Chalk, and the actual top defined on lithology. In the Trurnpletts Farm Borehole, the Lewes Nodular Chalk appears to extend to a lower stratigraphical horizon than in the Banterwick Barn No. 2 Borehole. There is • some tentative evidence that the Boxford Borehole succession might have been affected by faulting 1 shearing. XX/00/00;Draft 0.1 Last modified: 2003/02/2416:28

Appendix 1 - author citations for fossil species

Cladoceramus undulatoplicatus Werner, 1 855) Cremnoceramus waltersdorfnsis (Andert, 19 1 1) Micraster normanniae Bucaille, 1883 Volviceramus involutus (J de C Sowerby, 1828) I XX/00100;Draft 0.1 Last modified: 2003102124 1628 a References

Most of the references listed below are held in the Library of the British Geological Survey at Keyworth, Nottingham. Copies of the references may be purchased fiom the Library subject to • the current copyright legislation.

GALE,A S. 1996. Turonian correlation and sequence stratigraphy of the Chalk in southern England. In HESSELBO,S P & PARKINSON, D N (eds), Sequence Stratigraphy in British Geology, Geological Society Special Publication, No. 103, pp. 177-195. MORTIMORE,R N. 1986. Stratigraphy of the Upper Cretaceous White Chalk of Sussex. Proceedings of the Geologists' Association, 97,97- 139. MORTIMORE,R N, WOOD,C J & GALLOIS,R W. 2001. British Upper Cretaceous Stratigraphy, Geological Conservation Review Series, No. 23, Joint Nature Conservation Committee, e Peterborough. WOODS,M A. 2000. Chalk macrofossils fiom the Hungerford - Newbury district, and adjoining areas: 1:10 000 quarter sheets: SU38SE, SU46NE, SU47NE, SW, SU57SW, SU58SW. British Geological Survey Internal Report, IR/00/48. WOODS, M A. 2001. Lithostratigraphical interpretation of borehole geophysical logs in the Chalk Group of the Berkshire Downs. British Geologicat Survey Internal Report, IR/O1/150.

Key to symbols used on lithological log

1 - / nodular flint

---- 1.3 sheet flint

I T]shell fragments L---

I I I nodular chalk I -A

-- z , Zoophycos

I I spongiferous chalk I - I

'-1 1 fault or fracture

stylolitic marl 1

I strongly indurated I r- 1 1 bioturbation (where especially $2conspicuous) --1 I Fe I strongly iron-stained chalk I L .-.J

, :gl / glauconitised clast I ___- I

I I pn 1 phosphatic clast

-7 4 hardground I1 I:? I:? I.::. I.::. sandy chalk .-.-.. . FIGURE 3: Lithological log of the Boxford (cored) Borehole [SU 428 7251

British Pro~ect LOC R Borehole NO ?L Geological Survey ~p G Iaocallt~ Name Sheet NATURAL INYIRONMINT RESIARCN COUNCIL 7 4 \Ct Start date Cllent Iloreholc dlamcter NGRIlat & long End date Ground level ('astng deta~ls Drlll~ngmethod Logged by Scale 20-= \\/\w S* llun no & Sampled Stratigraphy (m) I)r~llcr's ("re Intervals (where known) Descrlptlon Legend

e--

Comments NATUIAL 1ItV110NM11(1 I1SlAICN COUNCIL

British Project LOCAR Borehole No 3L 2 b Geological Survey '-ocallt~Name NATUIAL IWYIIOUPIIMT llllAlCH COUNCIL aoxg,a \3 ,\ \s Start date Cl~ent I3orchole d~ameter NGKIlat & long End date Ground level ('as~ngdeta~ls 1-ogged by Scale Dr~ll~ngmethod Za-= \ 5- Run no & Sampled Strat~graphy "el'th (nl) I)~lllcr's ('"'" Intervals (where known) below bmu,,d Descr~pt~on Legend

British pmject LOC Ah Borehole NO L zb G Geological Survey NATURAL lNVIROlllllYI Rl..ARCW council. Locality Name aoxddA Sheet \L 4 \Y Start date Client Borehole diameter NGRIlat & long

FIGURE 4: Lithological log of the Grimsby Wood (cored) Borehole [SU 5 14 7 1 91

FIGURE 5: Lithological log of the Tmpletts Farm a (cored) Borehole [SU 5 13 75 11

Comments

British Pm~ect LOC &R Borehole No &\ 0 Geologkd Survey

HAIUIAL IMVIIOWl4IMT IIWAICHCWlKlL LOcallt~ Name T--p\am FaV, Start date Cl~ent Borehole d~ameter End date Ground levylot \3 75\ Drllllng method Cas~ngdetails Logged by Scale MRw C;u Run no & Sampled Strat~graphy ::~'!d.",) Dr~ller's Intervals (where known) Descnption Legend depths Grp ( Fmn - .h/V - I

~\a~ccraw~\She CG*%~SCUOU+bioh

-- British Pro~ect LOC hk Borehole No Geologiul Survey /\ 0 NATURAL INYIRONIIINT RISIARCW COUNC8L Locallt~ Name - \V-?\P% FaV- Sheet 8 01 20 Start date Client Borehole d~ameter End date GroundNGMat<'yk\3 leve 7S\ Drilllng method Caslng details Logged by Scale Wkw 2.0~- Ua Description Legend British Pro~cct Lo CAR Borehole No P L\ 0 Geological Survey NATURAL lWVllQWCllMT Il.IAlCl4 COUNCIL LOcallt~ TqWp\ Q--3 Fo,u- Sheet 7 4 20 Start date Cl~ent Borehole d~arneter NGRIlat & Ion End date Ground sVh3leve 7s\

Dr~lllngmethod Caslng deta~ls Logged by Scale Nplw 20-= 5- Description Legend British Projcct LGcAR Borehole No 3L_\O =dog- Surve)r MATUIAL lMV110MMlMT IlIlAICW COUNCIL LOcallt~ Name - \ F~~~ Sheet \O 4 zo Start date Cl~cnt Borehole d~ameter NGRilat & long End date Ground lev>-\3 75\ Dr~ll~ngmethod Cas~ngdeta~ls Logged by Scale hw 2auu= ua

Descript~on Legend British Project LGC~R Borehole No $ L_\ 6 Geologkal Survey LOca'lt~Name - NAlUlAL INVllOYIllNT IISIAICHCOUNCIL T*-,p\ett> ksr, \ \ a Start date Cl~ent Borehole d~ameter NGRilat & long End date Ground level5us\3 75\ Logged by Drllllng method Caslng details Scale \qhw 20-= 5- Run no & Sampled Strat~graphy :,"c,h!(:i) Dr~ller's Intervals (where known) Description Legend depths Loss Grp ( Fmn #Y - / / /, I

Comments Bddsh Project LGCAR Borehole No P L\O -logkalsuv L°CalltyName NrrunrL annnowrrwlnrsamc* C~UWCOL T~--~\ens F-v- \I~ZCI Start date Cl~ent Borehole d~arneter NGRtlat & long End date Ground level5~5\3 1S\ Cas~ngdeta~ls Logged by Scale Drllllng method \qP\w -LO-= 5- Run no & Sampled Strattgraphy 'Iepth (m) 'Ore Intervals (where known) Description Legend bdow (.muad Driller's +WI- depths Loss Grp ( Fmn British LoC~& Borehole No. 3 L\a Ge0logk;rl Survey NITUIhL IWWIQNMIMT IIlIAICW COUNCIL local it^ Name T*-~\Q~ Fav- Sheet \3 0) 20 Start date Client Borehole diameter NGRnal {l?~ ,> -f5 \ End date Ground level

Drilling method Casing details Logged by Scale Mkw 20-4. 5- Run no. & Sampled Stratigraphy ~~~~~~) Driller's Loss Intervals (where known) Description Legend / %~r\depths Grp. I Fmn.

Comments British Project LOCAR Borehole No 3 L \ 0 Geologkal Survey LOcallt~ Name HATVIAL .NYIIOWIIINI I.S.AICO4 COUNCIL - I<-P\%%Fa*- Sheet \+A ro Start date Client Borehole diameter NGRAat glol% ,3 End date Ground level , Drilling method Casing details Logged by Scale Hhw 20-= S- Run no & Sampled Stratigraphy !,",Pw',hJz)Driller's Intervals (where known) Description Legend depths Grp I Fmn.

- _

Comments British Project Lo CAR Borehole No 3 L\ 0 Geologkd Survey NATUIAL IWVIROWMIWI RlSIAICH COUWClL LOca"t~Name -Lbwr\MYS LV- Sheet I

Comments British Project LOCAR Barehole No. 3L\O Geologkal Surve)r NATURAL IWVIRONWIWT RI#IARCW COUNCIL LOcallt~ Name Sheet

----A -- * Comments

FIGURE 6: Lithological log of the Frilsham Meadow (cored) Borehole [SU 538 7391 Comments Comments A~-~(iou =\\abore ~~-C-Q IDSbl 3 P Bl~~-~Jbie.4.

British project LOCAR Rorehole NO. P LllE Geological Survey NATVIAL IWYIIONMINT IISIAICH COUMCaL ',ocality

1 IStart date ]client Il3arehole diameter INGR/I~I& long I British Borehole No. P Lll E Geologkal Survey Project bcHR

NIlUlAL IWVIIOMMIWT I.SIAICH CWWClL '~Ocalit~Name F c ;\A, a.liU sheet 5 a] n Start date Client Borehole diameter NGRilat & long End date I Ground level Drilling method Casing details Logged by British Project Loc~~ Borehole No. Geological Survey PulE NATUIAL INVIIONNINT IISIIICH COUNCIL L-"calit~Name Sheet Fr;\Aav, \U edew 6 01- \3 Start date Client I3orcholc diameter NGRIlat & long \d3~kq&&k&-+ &"9\MOU6

Comments British Project LOCAR L ore hole NO P Lfl f Geological Suwey Idocallty Name NATURAL INVIIQI(CIINT II@IARCliCOUNCIL F*;\&d- Sheet s $ \3 Start date Cl~ent I3orehole d~ameter NGRIlat & long End date Ground level Caslng details Logged by Dr~lllngmethod ILIHVVA 'Zcu= 5- Run no & Sampled Strat~graphy Core Intervals (where known) ~~,P,~!~~)Dr~ller's Description Legend ~r* depths Grp I Fmn - I

Comments British Borehole NO Geological Survey Pro~ect LOCAR PLlx l-ocallt~ MATUIAL ~NVIIOW~~~NTI~UAICN COUNCIL Name Sheet q Ff;\g~\aw Start date Client Ilorehole d~ameter NGRAat & long End date I Ground level Casing details Drilling method Logged by Scale I\.IA\&~ ZOCM 151 British project 0 ('A R Borehole NO. Geologk;rl Survey PLll E MATUIAL .N~II~W*~NI IIIIAICH COUNCIL ~~~alityName \ 0 \O$ \3 Start date Client Rorehole dlameter NGRIlal & long End date 1 Ground level Drilling method Casing details Logged by Comments British Project Borehole No. Geologkal Survey NATURAL #NVlROWM#WT N#S#AaCM COUWClk i-ocal't~Name ;\ sh a \q A cl 0% \ a) \3 Start date Client Ijorehole d~ameter NGRIlat & long Comments FIGURE 7: Lithological log of the Broadfield Cottages (cored) Borehole [SU 549 7491

British Project L 0 Dorehole No. Geological Survey PL\3R NATMAL ENVIRONMSNTRSSSAIICM COUNCIL '-oca'it~Name & COa Vvaqeh ;JJ - 4-4 \ 7 Start date Client I3orehole diameter NGR/lat & long

British ~'roject L 0 13orehole No 31_ \314 Geological Survey NATURAL INVIIONWINT IISIAICHCOVNClL I.ocallty Ndnle

Start date Cl~ent Ijorehole d~dtneter NGR/lal& long knd date Ground level SU 547 749 ('as~ngdcta~ls Ilr~ll~ngmethod

llun no CG Sampled Strat~graphy Ikpth (Ill) ('ore Intervals (where known) Descr~pt~on Legend bd"u~,lou,,d ,11 lller'y depths I.0SS +VL (;rp I:mn 1 - - Swdd~w-~~- - - -%#------7 - - -

British l>rqect L_ 0 I+ Rorchole N(, p1_ \3 A Geological Survey c n NATURAL INVIRONMINT IISEAICM COUNCIL I "c~'"YNalllc %modk;dA bmY* \-2.,Q \g Start date Cl~ent I3orehole tilameter NGKIlat & long End date Ground level % 5 743 ('as~nydeta~ls I-ogged by I>rtll~ngmctliod ,y.dG,,=1, Run no & Sampled Strattgraphy (m) 11111le1'\ Intervals (where known) bdow (rn~~~~d Descr~pt~on Legend $.vJ depths British Pro~cct Lo CHR Dorchole NO P ~13A Geological Survey I OC~II~YNdT1lc NATURAL 1NVInOY)IINT RISIAIC* COUNCll BfO,~k;$J,L3d \3 J \4 Start date C'llent Ilorcholc d~amctcr NGR/lat & long 13nd date <;round level 50 5 &?-(74-7 ('avng dcta~ls Drllllng method Logged by

('omnicnts

British I~~OJCCI I3orehole No Geological Survey c_HR 3~\3A UATUMAL fiNV#RONMfiMT RfiSSAMCU COUNCIL '-Oca"t~ Sheet redl;e\J C-3Cd Starl date Cl~ent I3orcholc d~amcter NGRIlat & long

Comments hnd date I Ground level SU $4-9 74-55 ('as~nydetails Logged by Dr~ll~ngmethod

llun no & Sampled Strat~graphy ('"" Intervals (where known) Descr~pt~on Legend '~~~t~~~)I)rlllcr9s I-"'' @r" depths (jlp I:mn ------

FIGURE 8: Lithological log of the Frogmore Farm (cored) Borehole [SU 5 86 7 191

I Comments