Editing Jurassic, Tertiary and Quaternary around Great Ayton and Roseberry Topping, Cleveland Hills - an excursion

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Where this minor track reaches the well-developed track near a small beck, follow the stream bed downhill. In the stream section thin-bedded sandstones of Middle Jurassic age are underlain by a thick sequence of shales. Some disturbed ground on this junction together with loose blocks of ironstone suggest that the Dogger Formation (Aalenian, Middle Jurassic) may have been worked by opencast methods at this locality. Occasional finds of ''Dactylioceras commune ''in the shale sequence at [NZ 594 111] indicate the presence of the Alum Shale Member (Whitby Mudstone Formation; Upper Lias).
 
Where this minor track reaches the well-developed track near a small beck, follow the stream bed downhill. In the stream section thin-bedded sandstones of Middle Jurassic age are underlain by a thick sequence of shales. Some disturbed ground on this junction together with loose blocks of ironstone suggest that the Dogger Formation (Aalenian, Middle Jurassic) may have been worked by opencast methods at this locality. Occasional finds of ''Dactylioceras commune ''in the shale sequence at [NZ 594 111] indicate the presence of the Alum Shale Member (Whitby Mudstone Formation; Upper Lias).
  
The track then passes through the col known as Gribdale Gate [NZ 592 110] which is believed to have been used by meltwater drainage during the wastage of the last ice sheet, and may have been formed by meltwater erosion at an earlier time in the Quaternary. Join the road near the car park [NZ 583 110]. Note that the tracks from the sandstone quarries head towards Great Ayton. A gentle downhill road leads back to the station or Great Ayton, with views of the Ayton Bank iron mines and Alum Shales workings on your left.
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The track then passes through the col known as Gribdale Gate [NZ 592 110] which is believed to have been used by meltwater drainage during the wastage of the last ice sheet, and may have been formed by meltwater erosion at an earlier time in the Quaternary. Join the road near the car park [NZ 583 110]
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Note that the tracks from the sandstone quarries head towards Great Ayton. A gentle downhill road leads back to the station or Great Ayton, with views of the Ayton Bank iron mines and Alum Shales workings on your left.
  
 
== [[Yorkshire rocks and landscape: a field guide#Glossary|Glossary]] ==
 
== [[Yorkshire rocks and landscape: a field guide#Glossary|Glossary]] ==

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