Gilwern Hill, Powys on:
[Wikipedia]
[Google]
[Amazon]
Gilwern Hill is a hill about 3 mi / 5 km southeast of
Gilwern Hill is a hill about 3 mi / 5 km southeast of Llandrindod Wells
Llandrindod Wells (; ; ; ) is a town and community (Wales), community in Powys, Wales. It serves as the seat of Powys County Council, and is therefore the administrative centre of Powys. The town was Historic counties of Wales, historically in ...
in the county of Powys
Powys ( , ) is a Principal areas of Wales, county and Preserved counties of Wales, preserved county in Wales. It borders Gwynedd, Denbighshire, and Wrexham County Borough, Wrexham to the north; the English Ceremonial counties of England, ceremo ...
, Wales
Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...
.
Geology
The hill is composed from a range of lower and middleOrdovician
The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years f ...
volcaniclastic
Volcaniclastics are geologic materials composed of broken fragments (clasts) of volcanic rock. These encompass all clastic volcanic materials, regardless of what process fragmented the rock, how it was subsequently transported, what environment it ...
rocks which form a part of the Builth Inlier. Palaeontologist
Paleontology, also spelled as palaeontology or palæontology, is the scientific study of the life of the past, mainly but not exclusively through the study of fossils. Paleontologists use fossils as a means to classify organisms, measure geolo ...
s Pete Lawrance and Brian Beveridge have spent 30 years examining fossils from a privately owned limestone quarry on the hill. Amongst fossils so far identified at this location are the trilobite
Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most succ ...
s Meadowtownella, Bettonolithus
Bettonolithus is a genus of trilobites of the Order Asaphida. It is in the family Trinucleidae.
Fossil specimens have been found in the Lower Ordovician rocks of Gilwern Hill in Powys, Wales.
This trilobite was blind but anatomical evidence su ...
, Protolloydolithus
''Protolloydolithus'' is a genus of trinucleid trilobites found in Ordovician rocks in Gilwern Hill, Powys, Wales
Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish S ...
and Anebolithus
''Anebolithus'' is a genus of trilobites found in Gilwern Hill, Powys, Wales
Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to ...
together with Conulariida
Conulariida are an extinct group of medusozoan cnidarians known from fossils spanning from the latest Ediacaran up until the Late Triassic. They are almost exclusively known from their hard external structures (alternatively referred to as a the ...
, Iocrinus, Clonograptus and starfish
Starfish or sea stars are Star polygon, star-shaped echinoderms belonging to the class (biology), class Asteroidea (). Common usage frequently finds these names being also applied to brittle star, ophiuroids, which are correctly referred to ...
Stone rows
There are two prehistoricstone row
A stone row or stone alignment is a linear arrangement of megalithic standing stones set at intervals along a common axis or series of axes, usually dating from the later Neolithic or Bronze Age.Power (1997), p.23 Rows may be individual or groupe ...
s at the southern end of the hill, each with a large stone, more than 2m high, at one end.
References