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Survey Details for CRDGNGL050 - 2026-06-05

CRDGNGL050

Geological Landscape

Afon Teifi

Ceredigion

2008-01-08

  • Level 1: Lowland hills and valleys
  • Level 2: Lowland river and drainage systems
  • Level 3: Active lowland river-flood plain system

Monitoring

Q1 - Date of monitoring?

  • No Answer

Q1a - Monitoring undertaken by

  • No Answer

Q1b - Has this record been updated following monitoring work?

  • No Answer

Q1c - Change indicated by

  • No Answer

Q1d - What has changed?

  • No Answer

Q1e - Has the information ever been verified in the field?

  • Yes
    • Viewed during field transect of area.

Q2 - Does this area have a special or functional link with an adjacent area?

  • Yes
    • Part of glacially diverted Teifi river valley.

Description

Q3 - If Classification is "Other", specify here

  • Empty value

Q4 - What is the geographical and topographical character of this area?

  • Typically broad floodplain and meandering channel of the Afon Teifi (Quaternary, Holocene) from the Tregaron area past Lampeter, Llandysul and Newcastle Emylyn to the tidal limit near Cilgeran, SE of Cardigan. Includes incised, gorge-like sections cutting into bedrock near Cenarth and downstream in the Cilgeran area.

Q4a - Where bedrock dominated, what is the dominant bedrock type?

  • No Answer

Q4b - Where bedrock dominated, what is the age that characterises the aspect area?

  • No Answer

Q4c - Where bedrock dominated, what is the major rock lithogy (-ies)?

  • No Answer

Q4d - Where drift dominated, what is the dominant drift deposit?

  • Fluvial

Q4e - Where drift dominated, what is the major sediment that characterises the area?

  • Silt
  • Other

Q5 - What is the characteristic Level 3 component of the area?

  • Active lowland river-flood plain system

Q6 - Which of the following is a significant contributor to the geological character of the area?

  • Superficial deposits
    • Fluvial deposits, mainly active floodplain alluvium, probably with some low terrace deposits [QUATERNARY: HOLOCENE].
  • Active processes
    • Fluvial

Q7 - What additional subsidiary Level 3 components are notable?

  • Ancient lowland river flood plain system

Q8 - What Level 4 components are notable in this area?

  • River channel (natural)
  • Flood plain
  • River terrace

Q9 - What active geological and geomorphological processes are significant in this area?

  • Fluvial
  • Empty value

Q10 - Are there components of significant hydrological importance?

  • Yes
    • Afon Teifi

Q11 - Are there any pedological processes that are significant in the area or have had a landscape forming effect?

  • No

Q12 - Is there current mineral extraction?

  • No

Q13 - Has there been mineral extraction in the past?

  • Not known

Q14 - Are there SSSI/GCR sites here?

  • Yes
    • Afon Teifi at Cenarth GCR site (SN269416-SN276418) [Fluvial Geomorphology of Wales] (part)

Q15 - Are there geological SINC, 2nd tier, or RIGS sites in the area?

  • No

Condition

Q16 - Value

  • Outstanding
    • Includes GCR / SSSI features of national / international importance.

Q17 - Condition

  • Good
    • Dominantly rural area with limited significant development.

Q18 - Trend

  • Constant
    • Dominantly rural area with limited significant development.

Recommendations

Q19 - Existing management

  • Generally Appropriate

Q20 - Existing management remarks:

  • Dominantly rural area with limited significant development.

Q21 - Principal management recommendations

  • Ensure that no features or natural systems of geological or geomorphological significance in the area are lost or damaged (e.g. due to development or forestry). Ensure that SSSI features are maintained in favourable condition by implementation of management plans.

Q22 - Guideline

  • Long Term
    • Ensure that no features or natural systems of geological or geomorphological significance in the area are lost or damaged (e.g. due to development or forestry). Ensure that SSSI features are maintained in favourable condition by implementation of management plans.

Tolerance To Change

Q23 - Are there any significant threats to the current integrity and condition of the Earth Heritage features of the area?

  • Yes
    • Flood defence works and other developments affecting floodplain areas and the natural river system. No loss of key features should be considered acceptable.

Aspect Area Boundary

Q24 - To what level was this information site-surveyed?

  • Level 3

Q25 - At 1:10,000, how much of the Aspect Area boundary is precise?

  • Most
    • Aspect Area boundaries surveyed at 1:10,000 using aerial photographs, mapped at 1:25,000.

Q26 - What baseline information source was used for Aspect Area boundary mapping?

  • Other
    • 1:50,000 British Geological Survey maps, 1:10,000 aerial photographs (as stereo pairs), OS 1:25,000 Landranger topographical map.

Q27 - If OS Data was used, what was the scale?

  • 1:10,000 and 1:25,000

Q28 - What is the justification for the Aspect Area boundaries?

  • Break of slope at edge river floodplain / low terrace.

Evaluation

Q29 - Evaluation Criteria: Research Value

  • Outstanding
    • Includes GCR / SSSI features of national / international importance.

Q29a - Evaluation Criteria: Educational Value

  • Outstanding
    • Includes GCR / SSSI features of national / international importance.

Q30 - Evaluation Criteria: Historical Value

  • High
    • Includes GCR / SSSI features of national / international importance.

Q31 - Evaluation Criteria: Rarity / Uniqueness

  • High
    • Includes GCR / SSSI features of national / international importance.

Q32 - Evaluation Criteria: Classic Example

  • Outstanding
    • Includes GCR / SSSI features of national / international importance.

Q33 - Evaluation Criteria: Overall Evaluation

  • Outstanding
    • Includes GCR / SSSI features of national / international importance.

Q34 - Justification of overall evaluation

  • Includes GCR / SSSI features of national / international importance.

Bibliography

Q35 - Sources and additional assessments

  • BRITISH GEOLOGICAL SURVEY 2003, Sheet 193 (part Sheet 210,) 1:50,000 Geological Series; BRITISH GEOLOGICAL SURVEY 2007, Sheet 211, 1:50,000 Geological Series; BRITISH GEOLOGICAL SURVEY 2006a, Sheet 194, 1:50,000 Geological Series; BRITISH GEOLOGICAL SURVEY 2006b, Sheet 195, 1:50 000 Geological Series; DAVIES, J.R. et al. 2003, Sheet explanation, 1:50,000 Sheet 193 (part Sheet 210), NERC; DAVIES, J.R. 2007a, Sheet explanation, 1:50,000 Sheet 194, NERC; DAVIES, J.R. 2007b, Sheet explanation, 1:50,000 Sheet 195, NERC; GREGORY, K.J. (ed.) 1997, Geological Conservation Review Series 13, JNCC; ORDNANCE SURVEY 2005b, Explorer Map 198 (1:25, 000); ORDNANCE SURVEY 2005c, Explorer Map 199 (1:25, 000).

Assessment

Q36 - Additional Assessments

  • Empty value

Q37 - Additional Comments

  • Additional Level 4 features include: Meander.