My OperaHooked Spits
Friday, June 11, 2010 8:29:00 AM
Barrier islands are well known along the coast of Florida (particularly the Florida Keys north of Miami), and I seem to remember that some of them end in a hooked spit (but I may be wrong of course). Barrier islands are sedimentary islands separated from the mainland by bays or lagoons, and some originate as sand spits. A hooked spit is a landform created by the water currents and may be described as a curved sand bar. In fact barrier island systems often terminate with hooked spit morphologies.
Here is a nice image (from Wikipedia) of the Provincetown Spit, at the northern end of Cape Cod.
Closer by my backyard is however a nice and well studied example of a hooked spit, namely the “ellenbogen” (“elbow”) on the island of Sylt in northern Germany (southern North Sea).
The latest issue of the journal Sedimentology has a paper titled “Anatomy and sedimentary model of a hooked spit (Sylt, southern North Sea)” by Lindhorst et al. The paper presents a sedimentary model for hooked spit depositional systems based on ground-penetrating radar and sedimentological data.
According to the abstract
During the last decades sediment delivery to this hooked spit increased by a factor two to three.
The journal Sedimentology is NOT Open Access (I have a subscription).
PS:
Hvis nogen skulle være interesseret kaldes det en krumodde på dansk, se bl. a.
http://www.denstoredanske.dk/index.php?title=Rejser,_geografi_og_historie/Geografi/Naturgeografi/Geomorfologi_og_kysttyper/krumodde
Here is a nice image (from Wikipedia) of the Provincetown Spit, at the northern end of Cape Cod.
Closer by my backyard is however a nice and well studied example of a hooked spit, namely the “ellenbogen” (“elbow”) on the island of Sylt in northern Germany (southern North Sea).The latest issue of the journal Sedimentology has a paper titled “Anatomy and sedimentary model of a hooked spit (Sylt, southern North Sea)” by Lindhorst et al. The paper presents a sedimentary model for hooked spit depositional systems based on ground-penetrating radar and sedimentological data.
According to the abstract
“The recurved main spit of Sylt Island (southern North Sea) is dominated by migrating sand dunes; the investigated hooked spit exhibits a system of foredune ridges, oriented perpendicular to the dunes of the recurved spit. The development of the hooked spit is related closely to the presence of an adjacent tidal inlet, where strong tidal currents and a steep bathymetry prevent a further northward progradation of the main spit and trigger a deflection from northerly-directed to easterly-directed net sediment transport.”
During the last decades sediment delivery to this hooked spit increased by a factor two to three.
The journal Sedimentology is NOT Open Access (I have a subscription).
PS:
Hvis nogen skulle være interesseret kaldes det en krumodde på dansk, se bl. a.
http://www.denstoredanske.dk/index.php?title=Rejser,_geografi_og_historie/Geografi/Naturgeografi/Geomorfologi_og_kysttyper/krumodde
simoncito # Friday, June 11, 2010 1:07:16 PM
I wonder if the "Darßer Ort" of the "Fischland - Darß - Zingst" peninsula on the Baltic Coast of Germany is another example? There is a little port there, on the eastern side, which is said to have a detrimental influence on the sediment dynamics of the peninsula (if I am right, the currents usually eat away on the western side and add new sediments "around the corner" on it's northern coast).
Here is where it's at, it's pretty close to Denmark, actually:
http://kurl.de/ohepa
Ole Nielsennielsol # Friday, June 11, 2010 3:40:27 PM
A.o. eating aways sand on one side and adding it on the other side.
Here are a few typical examples of hooked spits for comparison:
West end of Endelave island, Denmark.
Dungeness Harbor, Washington.
Cape Lookout, North Carolina.
Messina Spit, Sicily.
Skagen spit (Skagens Odde) is on the other hand usually charachterised as a “broad spit”.
Ole Nielsennielsol # Saturday, June 12, 2010 7:42:58 AM
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=dungeness+spit,+wa&sll=37.0625,-95.677068&sspn=36.231745,86.572266&ie=UTF8&hq=&hnear=Dungeness+Spit,+Sequim,+Clallam,+Washington+98382&ll=48.174786,-123.14764&spn=0.059641,0.169086&t=h&z=13
Thank you!
Dorte Jakobsendortejakobsen # Saturday, June 12, 2010 7:10:45 PM
Ole Nielsennielsol # Saturday, June 12, 2010 8:50:30 PM
Bortset fra det synes jeg at "Skagens tap" ville lyde lidt fjollet - og dog ???
Måske kunne man ved et fingeret uheld, få en mands slips til at sidde fast i krumpappen? Men hvem går nu med slips, nutildags?