(Black Rock Dolomite) - 2004

The Black Rock Dolomite is a very hard bed which looks like concrete. There are verious colours and large blocks can be found around Battery Point.

(Lower Limestone Shale) - 2004

The fossils are found in the Lower Limestone Shale, rocks are exposed on the foreshore and there are cliff sections well exposed at Battery Point (above)

Buy SAMPLES from UKGE

Crinoidal Limestone, (Portishead) Samples from UKGE are presented in 3" by 2" trays with labels. They are also sealed in mini-grip bags. Click here to BUY ONLINE from our Store

Portishead Beds, Upper Red Sandstone Samples from UKGE are presented in 3" by 2" trays with labels. They are also sealed in mini-grip bags. Click here to BUY ONLINE from our Store

Devonian	Late	Famennian	354 to 364
		Frasnian	364 to 370
	Middle	Givetian	370 to 380
		Eifelian	380 to 391
	Early	Emsian	391 to 400
		Praghian	400 to 412
		Lochkovian	412 to 417

Carboniferous	Silesian	Stephanian		290 to 306
		Westphalian	Westphalian	306 to 308
			Bolsovian	308 to 311
			Duckmantian	311 to 314
			Langsettian	314 to 316
		Namurian	Yeadonain	316 to 318
			Marsdenian	318 to 319
			Kinderscoutian	319 to 320
			Alportian	320 to 322
			Chokierian	322 to 324
			Arnsbergian	324 to 325
			Pendleian	325 to 327
	Dinantian	Visean	Brigantian	327 to 330
			Asbian	330 to 334
			Holkerian	334 to 337
			Arundian	337 to 340
		Tournaisian	Chadian	340 to 344
			Courceyan	344 to 354

B

Tournaisian 340 to 354MYA
FORMATIONS AND DEPOSITS			LOCATIONS
Chadian	Avonian	Pembroke Limestone Group	Lydstep Headland West Angle Bay
	Clifton Down Group	Clifton Down Limestone
		Goblin Combe Oolite
		Clifton Down Mudstone
		Gully Oolite
Courceyan	Black Rock Group	Black Rock Dolomite	Portishead Weston-Super-Mare
		Black Rock Limestone	Weston-Super-Mare
		Main Chert
		Lower Chert
		Dolomite
	Volcanic Tuffs		North Berwick
	Lower Limestone Shale	Lower Limestone Shale	Portishead
		Shirehampton Beds
		Third Limestone Series	Clints Quarry
		Fourth Limestone Series	Clints Quarry
		Bryozoa Bed

Famennian 354 - 364 MYA
FORMATIONS AND DEPOSITS		LOCATIONS
U P P E R R E D S A N D S T O N E	Balnagown Group
	Portishead Beds	Portishead
	Tintern Sandstone
	Dunnet Head Sandstone Group

1:250 000 Geological Map of Portishead Geological Maps are sold either Flat or Folded for Solid, or Seabed geology. Special editions may be available for certain locations. For a complete list click the link below. Click here to BUY ONLINE from our Store

1: 50 000 Geological Map of Portishead Geological Maps are sold either Flat or Folded for Solid, Drift or combined geology. Special editions and memoirs are available for certain locations. For a complete list of 1: 50 000 maps, click the link below. Click here to BUY ONLINE from our Store

1:25 000 Classic Area Map of Portishead Classic Area Map showing the geology of Portishead Click here to BUY ONLINE from our Store