Archive for June 19th, 2015

Exploring Caithness, Scotland

June 19th, 2015

1 Thurso coast viewTHURSO, SCOTLAND (June 19, 2015) — After meeting in the morning for our 2015 Larwood Symposium, most of the participants then went on a field trip in the region around Thurso in the Caithness district, northern Scotland. Above is a view of the Thurso coast at low tide.

2 Dunnet Head lighthouseOne of the places we visited was Dunnet Head, the most northerly point in mainland Britain. The lighthouse is shown above.

3 Dunnet Head viewThe rocks in this part of Scotland are as austere as the rest of the country. This is the Old Red Sandstone, a Devonian unit found widely in Great Britain. It was deposited under mostly terrestrial conditions, and includes sediments from rivers, lakes, sand dunes and wadis. It splits easily in this part of Scotland into flat slabs called flagstones, which are used for buildings, walls, and tombstones.

4 Dunnet Head flowersThere are beautiful flowers on the windswept slopes of Dunnet Head. If I can, I’ll identify these later and add the name to this post. [Caroline Palmer did us the service: Armeria maritima (Thrift). Thanks, Caroline!]

5 Dunnet Head flowers 2For some reason purple is the most common flower color today. [Caroline identified this as Silene dioica (Red Campion).]

6 Dunnet Head orchidThis is a delicate little orchid I found sheltering behind a wall. [Ah, I made a classic mistake. Caroline points out that this is not an orchid, but a damaged Red Campion (as above). My perspective in this photo gave it a misleading orchid-like appearance. Always a lesson!]

7 John OGroats signJohn O’Groats is the most northeasterly point of mainland Britain. The small village here is 876 miles away from Land’s End in Cornwall, the most southwesterly part of the country. Apparently this is a big deal.

8 Paul Patrick John OGroatsHere we see a typical activity of bryozoan workers: checking fish traps for encrusting colonies. Paul Taylor is on the left and Patrick Wyse Jackson on the left. Paul looks superficially well-dressed, but he’s wearing Crocs on his feet.

9 Old Man of Hoy 2In the evening our party boarded a NorthLink ferry and sailed to Stromness. On the way we passed a sea stack known as the Old Man of Hoy. This erosional feature appeared some time after 1750, and like all coastal rock formations, it is destined to fall into the relentless waves.

10 Stromness from hotel windowFinally in the late evening we made it to the harbor in Stromness, Orkney. This is the view from my window in the Stromness Hotel. The white and blue ferry can be seen in the upper left. We settled in for the night to resume our meeting in the morning.

Wooster’s Fossil of the Week: An undescribed cyclostome bryozoan from the Upper Ordovician of Oklahoma

June 19th, 2015

HT_1276 585Paul Taylor and I presented a talk this month at the Larwood Symposium of the International Bryozoology Association in Thurso, Scotland. (Yes, way in the tippy-top of Scotland. Very cool.) Paul found the above wiggly bryozoan encrusting the interior of an orthid brachiopod identified as Multicostella sulcata (thanks, Alycia Stigall!) in the Lower Echinoderm Zone of the Mountain Lake Member of the Bromide Formation (Upper Ordovician, Sandbian) near Fittstown, Oklahoma. This bryozoan is “new to science”, as we grandly say. Paul generously invited me to describe it with him in this presentation and in a future paper. We did a 1994 paper together on Corynotrypa, a similar cyclostome bryozoan. The following are a few slides from our Larwood talk.

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Slide21_052815This last image showing what appear to be an interior wall with a pore is critical. Corynotrypa does not have such walls, so our bryozoan is more like a sagenellid cyclostome.

References:

Carlucci, J.R., Westrop, S.R., Brett, C.E. and Burkhalter, R. 2014. Facies architecture and sequence stratigraphy of the Ordovician Bromide Formation (Oklahoma): a new perspective on a mixed carbonate-siliciclastic ramp. Facies 60: 987-1012.

Taylor, P.D. and Wilson, M.A. 1994. Corynotrypa from the Ordovician of North America: colony growth in a primitive stenolaemate bryozoan. Journal of Paleontology 68: 241-257.