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Survey Details for YNSMNGL025 - 2025-04-11

YNSMNGL025

Geological Landscape

Afon Goch

Anglesey

2006-11-24

  • 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?

  • No

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

  • Yes
    • links t to YNSMNGL4 (Llanellian -Bodgadfa).

Description

Q3 - If Classification is "Other", specify here

  • N/A.

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

  • Segment of river system with narrow flood plain and a broad, flat depositional basin south-west of Llandyfrydrg (Quaternary: Recent).

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?

  • 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
    • Alluvium (fluvial), ?lake and mire deposits [Quaternary: Recent (Holocene)].
  • Active processes
    • Fluvial.
  • Past processes
    • Glacial.

Q7 - What additional subsidiary Level 3 components are notable?

  • No Answer

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

  • River channel (natural)
  • Flood plain

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 Goch

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

  • Not known

Q12 - Is there current mineral extraction?

  • No

Q13 - Has there been mineral extraction in the past?

  • No

Q14 - Are there SSSI/GCR sites here?

  • No

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

  • No

Evaluation

Q16 - Value

  • Moderate
    • No notable sites recorded and geomorphology typical of feature/process and not known to be exceptional or is widespread.

Q17 - Condition

  • Good
    • Rural area with no significant development.

Q18 - Trend

  • Constant
    • Rural area with no significant development.

Recommendations

Q19 - Existing management

  • Generally Appropriate

Q20 - Existing management remarks:

  • Rural area with no significant development.

Q21 - Principal management recommendations

  • Maintain natural evolving system, minimise future intervention and ensure that no significant geological or geomorphological features are lost or damaged.

Q22 - Guideline

  • Long Term
    • Maintain natural evolving system, minimise future intervention and ensure that no significant geological or geomorphological features are lost or damaged.

Tolerance To Change

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

  • No

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, mapped at 1:25,000.

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

  • Other
    • British Geological Survey maps, aerial photographs, OS 1:25,000 Landranger topographical map.

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

  • 1:25,000

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

  • Break of slope at base of surrounding till dominated area and edge of active river/floodplain / terrace system.

Evaluation Matrix

Q29 - Evaluation Criteria: Research Value

  • Moderate
    • No notable sites recorded and geomorphology typical of feature/process and not known to be exceptional or is widespread.

Q29a - Evaluation Criteria: Educational Value

  • Low
    • No notable sites recorded and geomorphology typical of feature/process and not known to be exceptional or is widespread.

Q30 - Evaluation Criteria: Historical Value

  • Low
    • No notable sites recorded and geomorphology typical of feature/process.

Q31 - Evaluation Criteria: Rarity / Uniqueness

  • Low
    • No notable sites recorded and geomorphology typical of feature/process.

Q32 - Evaluation Criteria: Classic Example

  • Low
    • No notable sites recorded and geomorphology typical of feature/process and not known to be exceptional or is widespread.

Q33 - Evaluation Criteria: Overall Evaluation

  • Moderate
    • No notable sites recorded and geomorphology typical of feature/process and not known to be exceptional or is widespread.

Q34 - Justification of overall evaluation

  • No notable sites recorded and geomorphology typical of feature/process and not known to be exceptional or is widespread.

Bibliography

Q35 - List the key sources used for this assessment

  • GREENLY, E. 1919, Memoir of the Geological Survey of Great Britain, 78; INSTITUTE OF GEOLOGICAL SCIENCES 1974. Anglesey, 1:50,000 Special Sheet, Geological Survey of Great Britain; ORDNANCE SURVEY 2005a, Ordnance Survey Explorer Map 263 (1:25, 000); www.geomon.org.uk.

Assessment

Q36 - Additional Assessments

  • None.

Q37 - Additional Comments

  • Additional Level 4 features include: Stream.