Sandstone Sills -

Sandstone sills are significant to geologists for several reasons:

: High pore-fluid pressure causes sand to behave like a liquid. sandstone sills

| Feature | Typical range | |--------|---------------| | | 40–75 mm (1.6–3″) – thicker for wide windows (>1.5m) | | Projection | 25–50 mm beyond wall face (minimum 15 mm drip groove setback) | | Width = wall thickness + 2 x projection | e.g., 300 mm wall + 50 mm each side = 400 mm sill | | Length = window opening + 100–150 mm each side (to support reveals) | Sandstone sills are significant to geologists for several

To ensure the longevity of sandstone sills, proper installation and care are essential. This includes: sandstone sills

(e.g., North Sea or California injectites) Academic depth (e.g., fluid dynamics of sand injection) ResearchGatehttps://www.researchgate.net

: Large sills can sometimes be seen on seismic scans as "bright spots" or irregular discordant reflectors.