APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

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APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by APOD Robot » Sun Sep 04, 2022 4:05 am

Image Sea and Sky Glows over the Oregon Coast

Explanation: Every step caused the sand to light up blue. That glow was bioluminescence -- a blue radiance that also lights the surf in this surreal scene captured in mid-2018 at Meyer's Creek Beach in Oregon, USA. Volcanic stacks dot the foreground sea, while a thin fog layer scatters light on the horizon. The rays of light spreading from the left horizon were created by car headlights on the Oregon Coast Highway (US 101), while the orange light on the right horizon emanates from a fishing boat. Visible far in the distance is the band of our Milky Way Galaxy, appearing to rise from a dark rocky outcrop. Sixteen images were added together to bring up the background Milky Way and to reduce noise.

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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by Rauf » Sun Sep 04, 2022 9:04 am

"Every step caused the sand to light up blue."
What does this mean exactly??

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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by orin stepanek » Sun Sep 04, 2022 12:50 pm

MilkyWayOregon_Montoya_960.jpg
Beautiful Oregon coastline from bio luminescence! What a neat way
to communicate! 8-)
glories_tudorica.jpg
Fog bow! Many beautiful photos in today's APOD
06302017_dog_with_headphones_iStoc.2e16d0ba.fill-735x490.jpg
Smart dog; keeping out the noise pollution! :lol2:
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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by Chris Peterson » Sun Sep 04, 2022 2:17 pm

Rauf wrote: Sun Sep 04, 2022 9:04 am "Every step caused the sand to light up blue."
What does this mean exactly??
When bioluminescent microorganisms are present in the water, walking on wet sand at the water's edge can leave glowing footprints behind.
Chris

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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by Ann » Sun Sep 04, 2022 2:39 pm

Rauf wrote: Sun Sep 04, 2022 9:04 am "Every step caused the sand to light up blue."
What does this mean exactly??
Click to play embedded YouTube video.
Wikipedia wrote:
Bioluminescence is the production and emission of light by living organisms. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria, and terrestrial arthropods such as fireflies...

The most frequently encountered bioluminescent organisms may be the dinoflagellates in the surface layers of the sea, which are responsible for the sparkling phosphorescence sometimes seen at night in disturbed water. At least 18 genera exhibit luminosity. A different effect is the thousands of square miles of the ocean which shine with the light produced by bioluminescent bacteria, known as mareel or the milky seas effect.

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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by johnnydeep » Sun Sep 04, 2022 2:57 pm

So, is the "dark rocky outcrop" not just another "volcanic stack"? I don't see much difference between it and the other stacks in the background.
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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by De58te » Sun Sep 04, 2022 3:16 pm

Chris Peterson wrote: Sun Sep 04, 2022 2:17 pm
Rauf wrote: Sun Sep 04, 2022 9:04 am "Every step caused the sand to light up blue."
What does this mean exactly??
When bioluminescent microorganisms are present in the water, walking on wet sand at the water's edge can leave glowing footprints behind.
Hmm, that probably explains why the western state of Oregon. particularly the coast region, is called a Blue State. Blue bio-luminescence.

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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by MarkBour » Sun Sep 04, 2022 6:46 pm

johnnydeep wrote: Sun Sep 04, 2022 2:57 pm So, is the "dark rocky outcrop" not just another "volcanic stack"? I don't see much difference between it and the other stacks in the background.
Right. The large one in the foreground, dominating the picture, is one of the volcanic sea stacks.
A typical one, just the closest one in the view.

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Chris Peterson
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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by Chris Peterson » Sun Sep 04, 2022 7:13 pm

MarkBour wrote: Sun Sep 04, 2022 6:46 pm
johnnydeep wrote: Sun Sep 04, 2022 2:57 pm So, is the "dark rocky outcrop" not just another "volcanic stack"? I don't see much difference between it and the other stacks in the background.
Right. The large one in the foreground, dominating the picture, is one of the volcanic sea stacks.
A typical one, just the closest one in the view.
The large one in the APOD is Cave Rock. I believe that none of these stacks are volcanic, but are Otter Point Formation sandstones.
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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by johnnydeep » Sun Sep 04, 2022 7:16 pm

MarkBour wrote: Sun Sep 04, 2022 6:46 pm
johnnydeep wrote: Sun Sep 04, 2022 2:57 pm So, is the "dark rocky outcrop" not just another "volcanic stack"? I don't see much difference between it and the other stacks in the background.
Right. The large one in the foreground, dominating the picture, is one of the volcanic sea stacks.
A typical one, just the closest one in the view.


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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by johnnydeep » Sun Sep 04, 2022 8:14 pm

Chris Peterson wrote: Sun Sep 04, 2022 7:13 pm
MarkBour wrote: Sun Sep 04, 2022 6:46 pm
johnnydeep wrote: Sun Sep 04, 2022 2:57 pm So, is the "dark rocky outcrop" not just another "volcanic stack"? I don't see much difference between it and the other stacks in the background.
Right. The large one in the foreground, dominating the picture, is one of the volcanic sea stacks.
A typical one, just the closest one in the view.
The large one in the APOD is Cave Rock. I believe that none of these stacks are volcanic, but are Otter Point Formation sandstones.
Huh. Not to be confused with the Otter Sandstone Formation in England - https://en.wikipedia.org/wiki/Otter_Sandstone_Formation, and here:
https://www.sciencedirect.com/science/article/abs/pii/S0016787814000601 wrote:Abstract
The Triassic succession of the East Devon coastline is a key component of the Jurassic Coast World Heritage Site. Within these strata are the sediments deposited by two major river systems: the Budleigh Salterton Pebble Beds and the Otter Sandstone Formation. The latter are significant as both a reservoir for the Dorset oilfields near Wareham and as a source of significant numbers of vertebrate fossils. The Otter Sandstone Formation, of Anisian (Middle Triassic) age, has a lower part formed of aeolian sands but these pass upwards into a series of river channel deposits. These river channels, which are best seen between the mouth of the River Otter and Ladram Bay, contain a series of classic features such as erosive channel bases, channel lag deposits, de-watering structures, calcified root systems (rhizoliths), reworked calcretes and (rare) overbank mudstones.
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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by Chris Peterson » Sun Sep 04, 2022 8:16 pm

johnnydeep wrote: Sun Sep 04, 2022 8:14 pm
Chris Peterson wrote: Sun Sep 04, 2022 7:13 pm
MarkBour wrote: Sun Sep 04, 2022 6:46 pm

Right. The large one in the foreground, dominating the picture, is one of the volcanic sea stacks.
A typical one, just the closest one in the view.
The large one in the APOD is Cave Rock. I believe that none of these stacks are volcanic, but are Otter Point Formation sandstones.
Huh. Not to be confused with the Otter Sandstone Formation in England - https://en.wikipedia.org/wiki/Otter_Sandstone_Formation, and here:
https://www.sciencedirect.com/science/article/abs/pii/S0016787814000601 wrote:Abstract
The Triassic succession of the East Devon coastline is a key component of the Jurassic Coast World Heritage Site. Within these strata are the sediments deposited by two major river systems: the Budleigh Salterton Pebble Beds and the Otter Sandstone Formation. The latter are significant as both a reservoir for the Dorset oilfields near Wareham and as a source of significant numbers of vertebrate fossils. The Otter Sandstone Formation, of Anisian (Middle Triassic) age, has a lower part formed of aeolian sands but these pass upwards into a series of river channel deposits. These river channels, which are best seen between the mouth of the River Otter and Ladram Bay, contain a series of classic features such as erosive channel bases, channel lag deposits, de-watering structures, calcified root systems (rhizoliths), reworked calcretes and (rare) overbank mudstones.
No, not to be confused with that one. Quite different!
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Re: APOD: Sea and Sky Glows over the Oregon Coast (2022 Sep 04)

Post by Rauf » Wed Sep 07, 2022 4:50 am

Chris Peterson wrote: Sun Sep 04, 2022 2:17 pm
Rauf wrote: Sun Sep 04, 2022 9:04 am "Every step caused the sand to light up blue."
What does this mean exactly??
When bioluminescent microorganisms are present in the water, walking on wet sand at the water's edge can leave glowing footprints behind.
I see, thanks for the clarification!!