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Posts treating: "James River"

Thursday, 03 September 2015

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Placopecten clintonius pelecypod from the Yorktown formation of Virginia 

Views of the Mahantango [2015-09-03 09:01:00]  recommend  recommend this post  (218 visits) info

 Neogene; US
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This shell was among a number of Chesapectin jeffersonius specimens and it caught my eye due to the difference. A little research leads me to believe that this is a Placopecten clintonius pelecypod as it exists within the Yorktown formation at the same horizon as C. jeffersonius. The shell is smaller than C. jeffersonius and the radial ribs are both more numerous and finer.This specimen came from the Yorktown Formation, which is Neogene in age (Pliocene epoch, Zanclean stage), along the James [...]

Chesapectin jeffersonius pelecypod from the Yorktown formation of Virginia 

Views of the Mahantango [2015-09-01 09:01:00]  recommend  recommend this post  (223 visits) info

 Neogene; US
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I acquired this shell at a rock/fossil/mineral show this past spring from someone who collected it themselves. It's a Chesapectin jeffersonius pelecypod from the Yorktown formation (Neogene, Pliocene epoch, Zanclean stage) of Virginia and was found along the James River.  The shell is enormous and I can just imagine what the scallops would have tasted like! It's only a single valve, I'm not sure if it is the left or the right but was a host to some epibionts. There are large barnacles [...]

The whales of Chuckatuck, Part 1 

Updates from the Vertebrate Paleontology Lab [2011-03-24 15:00:49]  recommend  recommend this post  (120 visits) info

 Neogene
Chuckatuck, Virginia is a small town in Isle of Wight County that sits near the James River. Over the years several quarries have been opened in or near the town, all of which exposed the Moore House Member of the Yorktown Formation. The Moore House is the youngest member of the Yorktown, and is late Pliocene in age (~ 3.5 million years). The Moore House is known for its abundant and diverse mollusk fauna, and nowhere is this displayed better than at Chuckatuck, which has an absolutely [...]

Whales in the mountains 

Updates from the Vertebrate Paleontology Lab [2011-03-23 16:26:42]  recommend  recommend this post  (76 visits) info

 Neogene
I work for a public museum (VMNH is a Virginia state agency), so part of my job is answering questions from the public about paleontology. This usually takes the form of identifying “fossils” that people have found in a local stream or some other unlikely place. About 90% of the time they’re mistaken, and I’m left with the unenviable task of telling someone that their prized fossil is, in fact, a rock. But every now and then I get something different.Last week Francis Deboever sent me a [...]

Barnacle scars revisited 

Updates from the Vertebrate Paleontology Lab [2011-03-18 13:47:54]  recommend  recommend this post  (80 visits) info

 Neogene
A few weeks ago I posted about circular trace fossils on the ribs of “Sinistra”, the Carmel Church Diorocetus. In the comments on that post, boesse and I debated whether or not these were barnacle scars, and I was eventually convinced that they were after seeing similar features on the Lake Waccamaw Balaenula skull. After boesse commented that barnacle scars are quite rare on vertebrate bones, I began wondering if we might have other examples in our collections. It took me just a few [...]

First field trip of the year: York River, Virginia 

Magma Cum Laude [2011-01-08 19:05:38]  recommend  recommend this post  (57 visits) info
As part of a quick trip to visit my Alma Mater earlier this week, I took an afternoon to go exploring on the shores of the York River. The river forms the northern border for the peninsula on which Williamsburg and its environs are located, and the York River (along with the James River to the south) is an excellent place to take a look at some Coastal Plain

Eagle Rock 

Updates from the Vertebrate Paleontology Lab [2010-07-05 17:18:28]  recommend  recommend this post  (54 visits) info

 Devonian,Silurian,Ordovician
On Friday and Saturday I accompanied Brett’s physical geology class from Patrick Henry Community College on a field trip to look at Paleozoic rocks in Botetourt County. One of the stops was an amazing roadcut on US 220 near Eagle Rock (37.641110,-79.806688). The James River cut a gorge through a thick section of Paleozoic sediments here, which was widened with the construction of the highway. About 60 million years of time is exposed in the section, ranging from the Late Ordovician to the [...]

Falls of the James III: river work 

Mountain Beltway [2010-05-21 15:22:43]  recommend  recommend this post  (39 visits) info
In today’s post, I’ll finish up with my geologic discussion of the falls of the James River in Richmond Virginia, south of Belle Isle. Previously, we’ve examined the bedrock at this location (the Petersburg Granite) and a series of fractures – some faults and some extensional joints – that deform that granite. Now we come

Falls of the James II: fractures 

Mountain Beltway [2010-05-20 14:35:51]  recommend  recommend this post  (27 visits) info

 Carboniferous
In my previous post, I introduced you to the Petersburg Granite, as it is exposed south of Belle Isle, at the falls of the James River in Richmond, Virginia. I mentioned that it was fractured, and I’d like to take a closer look at those fractures today. The geologically-imparted fractures were exploited by human granite

Falls of the James I: pluton emplacement 

Mountain Beltway [2010-05-18 14:38:27]  recommend  recommend this post  (33 visits) info
Last Friday, NOVA colleague Victor Zabielski and I traveled down to Richmond, Virginia, to meet up with Chuck Bailey of the College of William & Mary, and do a little field work on the rocks exposed by the James River. Our destination was Belle Isle, a whaleback-shaped island where granite has been quarried for dimension
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