Linda Grashoff's Photography Adventures

Posts tagged “iridescence

Beats Me 2

May 7, 2018

Scroll down to see what I think the purpose of these things might be. And if you are curious about the iridescence, look at my reply to Bluebrightly’s comment on yesterday’s post.



The long story about the possible purpose of these things starts with the following two photographs.


I took the photograph of the centaur and its home on the dumpster before walking from the parking lot into the Oberlin Dollar General store. While I was paying for my purchase, one of the store employees came up to me all grins and asked if I was with “the remodel team.” When I conveyed total puzzlement, she went on: “We saw you taking photographs of the dumpster and wondered if you were with the remodel team; this store is about to be remodeled.” And that’s why a dumpster was parked in the parking lot. Try saying with a straight face that you just like to photograph dumpsters. I had to add that I photograph other things, too.

So, back to what beats me. I wonder if these things are used to move everything out of the store while it is being remodeled. I can’t figure out how they would work, but they are another new addition to the parking area of the store. I could have gone back into the store for clarification, starting with, “I just took some pictures of those . . .” Nah, I didn’t think so. Why push my luck.

Beats Me 1

May 6, 2018

Back to the Garden 4

November 8, 2017

I saw some Leptothrix discophora films at Schoepfle Garden last month. Here is one patch, with details of the overall photograph beneath.




New in Town

October 16, 2016

This dumpster wasn’t around the last time I photographed dumpsters in Oberlin. How nice to meet it.


Downriver Walk 2015—Still More Leptothrix discophora

November 9, 2015

Sometimes a Leptothrix discophora film can look colorful but very shear, very translucent. Why? I don’t know. (For that matter, I don’t know why some of the L. discophora films look opaque.) The first photo shows what I mean. The other four photographs show a film where much or all of the water has run out from underneath it as the river recedes from the bank so that the film rests on rocks or soil.

09182015 Schoepfle Garden-261


09182015 Schoepfle Garden-120


09182015 Schoepfle Garden-115


09182015 Schoepfle Garden-109

 09182015 Schoepfle Garden-281

Downriver Walk 2015—More Leptothrix discophora

November 1, 2015

I saw more manifestations of Leptothrix discophora September 18 than I showed last week. Here are five more views of it. The sixth photograph shows the iron-oxide precipitate of another oxidizing iron bacterium or bacteria and a lighter precipitate of a different mineral, perhaps aluminite, which has made its appearance in the Vermilion River riverbed on other occasions. To quote from my book, “Aluminite hasn’t been studied in the Vermilion River, but elsewhere it is known to form around fungal and bacterial masses.”

The talk I gave about my book to the Friends of the Oberlin College Library October 27 was recorded, and the video is now online.

09182015 Schoepfle Garden-266-Edit


09182015 Schoepfle Garden-49


09182015 Schoepfle Garden-62


09182015 Schoepfle Garden-129-Edit


09182015 Schoepfle Garden-99


09182015 Schoepfle Garden-212

Downriver Walk 2015—Leptothrix discophora

October 26, 2015

No walk downriver would be completely rewarding without finding some stunning biofilms and precipitates of the iron bacteria. This year, as usual, the reward was there.

I’ll be speaking about my book, They Breathe Iron: Artistic and Scientific Encounters with an Ancient Life Form, at the Friends of the Oberlin College Library tomorrow at 4:30 in the Moffett Auditorium of the Mudd Center. If you’ll be in Oberlin then, please come and say hello.

09182015 Schoepfle Garden-287


09182015 Schoepfle Garden-305


09182015 Schoepfle Garden-316


09182015 Schoepfle Garden-86

 09182015 Schoepfle Garden-78

July Iridescence 7

September 21, 2015

You can see how much Leptothrix discophora favors still river water by how it often insinuates itself in rocks that block the current.07312015 Schoepfle Garden-219

July Iridescence 6

September 14, 2015

You can see enough iridescence here for me to include this photo in the series, but what really got me was how clearly you can see the reflections of individual leaves in the water and Leptothrix discophora film.

07312015 Schoepfle Garden-165-3

July Iridescence 4

August 31, 2015

The jewel in its setting: Here is a photograph of another patch of Leptothrix discophora that shows the context, also taken the last day of July.

07312015 Schoepfle Garden-77