#sediments

[pangeen]

" Patterns " // © Roelie Steinmann

[geologyjohnson]

New video!

There's new(ish) video up on youtube giving a quick guide to sandstones. This is the same video I uploaded last year, but I've cleaned the audio up so that you can actually hear what I'm saying now!

You can check it out below

[sakuraswordly]

[informationatlas]

Meet the Real-Life Versions of Dune’s Epic Sandworms

[galacticgoldfishart]

so, uh, those new chapters eh?

[sexypinkon]

Sexypink - Shannon Alonzo - coming soon.

Sexypink - Trinidad and Tobago Artist Shannon Alonzo - A consummate craftswoman with a distinctive sense of purpose in her process. I am looking forward to this show.

Sexypink - Y Gallery Shannon Alonzo statement.

Sexypink - Shannon Alonzo

[oaresearchpaper]

Detecting Microplastic Contamination with Nile Red

Abstract

This study delves into the evaluation of fluorescent lights staining microscopy and its efficiency in cross validation by comparison with light microscopy. Rapid detection of microplastics of various sizes can be distinguished in assessing coastal marine sediment. A development of a novel approach in rapid detection is employed for analysis of coastal marine sediment microplastic contamination, based on fluorescent tagging using Nile Red (NR), separated by density-based extraction using Zinc Chloride (ZnCl2) and filtration. The fluorescent staining tags onto microplastic to fluorescent, aides with excitation of blue light and color filters. Fluorescence excitation is detected using simple smartphone photography through a polarizer filter. Rapid detection using light microscopy allows fluorescent particles to be identified and counted in image-analysis. The study used a paired sample t-test to compare particle counts across five mesh sizes, revealing minimal too little to no significant differences between fluoresced and suspected MPs particles, indicating a novel detection process with greater selectivity and fluorescence intensity.

Introduction

The Philippines is an archipelagic country which consists of 7,641 islands and has an extensive and diverse coastline. It boasts as one of the longest coastlines in the world with a measure of approximately 36,000 kilometers (22,370 miles). This coastline encompasses a wide variety of features ranging from pristine beaches to rugged cliffs and rocky shores. These coastal areas play a crucial role in the country's culture, economy, and ecology as they provide habitat to numerous fish species, marine life, and migratory birds. It also serves as hubs for trade, tourism, and agriculture. However, with high level of tourism and recreational activities in the area such as fishing, swimming, sailing, and snorkeling may lead to have larger amount of plastic waste that can pollute and contaminate the marine environment (Chaisanguansuk et al., 2023)

Plastics and other synthetic, non-biodegradable pollutants, which are often referred to as “marine debris,” have been contaminating and polluting the world’s enclosed seas, coastal waters, and the wider open oceans for the past five or six decades (Gregory, 2009). The hazard posed by plastic waste is significant because it starves and suffocates wildlife, distributes invasive and possibly dangerous species, absorbs toxic chemicals, and breaks down into microplastics that can be ingested (Barnes et al., 2009). These microscopic particles, also known as microplastic which are smaller than 5 mm in size, are present in many different environments. It poses a threat to the ecosystem due to their small size (millimeters or less), it is accessible to a variety of organisms with the ability to cause both physical and toxicological harm (Law and Thompson, 2014). Microplastics can be swallowed by low-trophic feeders, filters, and deposits, as well as by detritivores and plankton-eating organisms. As a result, they can build up inside organisms and cause physical damage, like internal abrasions or blockages. Aside from the physical damage, microplastics can also leach into the environment, where they can cause cancer or endocrine disruption (Wright, 2013).

Even though microplastic contamination affects biota, the environment, and public health significantly, it is a difficult problem to solve since it is so pervasive, and the specific adverse consequences of both long-term and short-term exposure are unknown (Savuca, 2022). Because of the growing worries about the amount of marine plastic waste and the effects it has had on marine ecosystems, marine plastic debris pollution has been identified as a global concern (Mu et al., 2019).

This study serves as baseline studies in microplastic contamination in the coastal environment in sediments of Anda, Northwestern Pangasinan. This study generally aimed to identify the presence of microplastic contamination along the coastlines in sediments of Anda, Northwestern Pangasinan. Specifically, it aimed to detect microplastic contamination using Nile Red fluorescence along the coastlines in sediments of Anda, Northwestern Pangasinan and to assess the efficacy of Nile Red fluorescence in staining for rapid detection of microplastics along the coastline of Anda, Northwestern Pangasinan. 

Source : Rapid detection of microplastic contamination using Nile red fluorescent tagging

[indefinite-pitch]

d_o_ppelgaenger - Akt I: Szene 3

[todropscience]

BOTTOM TRAWLING RELEASES HIDDEN CO₂ FROM THE SEAFLOOR

A new study reveals that bottom trawling, an industrial fishing practice that drags heavy nets across the seafloor, may significantly reduce the ocean's capacity to absorb carbon dioxide (CO₂). When sediment is resuspended by trawling, storms, or tides, it exposes previously buried compounds like pyrite (FeS₂) to oxygen. The oxidation of pyrite releases CO₂ into the water, contributing to the ocean’s carbon flux and potentially adding to atmospheric greenhouse gases.

Until now, most research had focused on how disturbing organic carbon in sediments accelerates its remineralization into CO₂. This new research, however, highlights that the oxidation of pyrite, a sulfur-based mineral, could be an even greater source of carbon dioxide from the seafloor. Since fine-grained sediments rich in pyrite are widespread on continental shelves, many of which overlap with commercial fishing zones, the implications are global.

This finding underscores an urgent need to reconsider bottom trawling practices, not only for their ecological impacts but also for their role in climate dynamics. Marine protected areas and bottom trawling bans could play a vital role in preserving the ocean's function as a carbon sink. As the climate crisis intensifies, protecting the seafloor may prove as important as conserving forests.

Main photo: Tube worms and brittle stars thriving in mud bottom. Photo Oceana

Reference: Kalapurakkal et al., 2025. Sediment resuspension in muddy sediments enhances pyrite oxidation and carbon dioxide emissions in Kiel Bight. Communications Earth & Environment

[starry-bi-sky]

yall ever think Shen Yuan went through like, internet withdrawal after being transmigrated into Shen Qingqiu? Like, he's canonically a NEET shut-in who did nothing but spend his time online, you can't tell me that for the first week or first few weeks of being SQQ he wasn't twitchy.

Like, reaching instinctively to his pockets for a phone that wasn't there, having an obsessive itch in the back of his mind that he should check and see if X or Y novel or webcomic has updated -- only to realize he can't anymore and being irritated by it. Wanting to go and see if there's new posts about this or that, but again realizing that he can't.

When he's bored or uncomfortable or just feels like wanting to escape he tries to go for his phone to distract himself, but oops! Not there anymore, and now he has to find a new and different way to distract himself from his feelings. And going through system notifications, quests, etc only does so much.

And there's that Tetris Effect too. SQQ makes a mistake while writing and instinctively goes to backspace on it except hey-ho that's not a keyboard and now he just dipped his pinkie into a bottle of ink or on a still-drying letter.

With him scrambling to fix his reputation and learn how to be a peak lord, I think his abrupt cold-turkey from all things internet would just be another straw on the camel's back that he promptly Ignores until it goes away on its own after he acclimates to his new surroundings.

[sergle]

WHEEEE I did nail art today

[fuckyeahfluiddynamics]

Dams Fill Reservoirs With Sediment

Dams are critical pieces of infrastructure, but, as Grady shows in this Practical Engineering video, they are destined to be temporary. The reason is that they naturally fill with sediment over time. (Video and image credit: Practical Engineering) Read the full article

[loethefox]

The year is 20XX. The MCYT cisgender nonbinary icon tournament is underway. Zedaph and Grian girlies (gender neutral) are fighting to the death in the tags during their bracket. Cleo is watching everything go down with a bucket of popcorn in their hands and occasional posts on bluesky. Joe tried to get himself entered in but was disqualified before the tournament began because they're a genuine gender icon. Scarlet Pearl ends up in the tournament for having such Woman energy in animatics that it causes a kind of integer overflow. Firebreathman ends up winning cause of that one twitch rivals mcc.

[kingstarkingslay]

Follow-up to Remus’s emotionally vulnerable letter to his pet rock, Sedrick

Because of course Sirius found it. And of course he had thoughts. And of course he wrote a letter. To the rock.

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To: Sedrick Species: Sedimentary (Tragically.) Occupation: Therapist, Desk Goblin, Thief of Affection Date: The Day My Boyfriend Emotionally Cheated on Me With a Rock

Dear Sedrick,

I hope you’re proud of yourself. You, a fist-sized boulder with no legs, no emotions, no cheekbones, have somehow wedged yourself into the most sacred space known to man: my boyfriend’s delicate, overthinking, tea-scented heart.

Impressive. Truly. Bravo. Mazel tov.

While I was out here risking my emotional stability every full moon — applying salves to his shoulder, braiding his hair back because “it’s in my mouth, Pads, get it out” — you were just sitting there. Looking smug. (Yes, I know you don't have a face. I can still tell.)

You didn’t even flinch when he named you Sedrick. That’s not even a name, it’s a geological pun, and you sat there and accepted it like the emotionally manipulative mineral you are.

Let me ask you something, Sedrick. Have you ever held Remus when he was sobbing into your cardigan because he accidentally crushed a spider and now believes in karmic punishment? Have you ever listened to him spiral about whether lycanthropy is a metaphor, an identity, or just “a really bad skin condition?” Have you ever told him he's enough — scars and all — with nothing but a touch and a look and a "stop talking, love, I’m right here"?

No. You just exist. And apparently, that’s enough now.

I would throw you into the lake if I thought it would matter. But I know he’d dive in after you. And knit you another scarf.

So instead, I’m writing this letter. Like a sane person. Which I’m not. Because I’m in a love triangle. With a werewolf. And a fucking rock.

Yours in silent loathing, Sirius Black (emotionally textured, thank you very much)

P.S. If you ever roll off that desk in the middle of the night again and land on my foot, I will file you down into decorative gravel. Consider this a formal warning.

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[barksbog]

foggy morning at the Danube river

[waxsuyaaa]

this is so cool whwhwhwhh

for the fanfiction ask thing!! can I get a 7? how did you come up with the title of lab grown opal?

I opalized dedf1sh in it. like. I get more in depth about it in the later chapters. like this part. in the newest chapter.

this passage details how her hands look like a black opal. I intentionally left it vague to keep the dreamy feel that I wanted for this scene.

but here's a sneak peek of the next chapter.

basically. sediments were deposited in dedf1sh as they were stuck underground, basically opalized their arms and legs which were submerged in the water. and there's some like symbolism about it in later chapters but that's beside the point. so yeah! lab grown opal because dedf1sh... is quite literally. a lab grown opal