Sediment Grain Size Chart for Rocks

Sediment Grain Size Chart for Rocks The grain sizes of sediments and sedimentary rocks are a matter of great interest to geologists. Different size sediment grains form different types of rocks and can reveal information about the landform and environment of an area from millions of years prior. Types of Sediment Grains Sediments are classified by their method of erosion as either clastic or chemical. Chemical sediment is broken down through chemical weathering  with transportation, a process known as corrosion, or without. That chemical sediment is then suspended in a solution until it precipitates. Think of what happens to a glass of saltwater that has been sitting out in the sun.   Clastic sediments are broken down through mechanical means, like abrasion from wind, water or ice. They are what most people think of when mentioning sediment; things like sand, silt, and clay. Several physical properties are used to describe sediment, like shape (sphericity), roundness and grain size. Of these properties, grain size is arguably the most important. It can help a geologist interpret the geomorphic setting (both present and historical) of a site, as well as whether the sediment was transported there from regional or local settings. Grain size determines just how far a piece of sediment can travel before coming to a halt.   Clastic sediments form a wide range of rocks, from mudstone to conglomerate, and soil depending on their grain size. Within many of these rocks, the sediments are clearly distinguishableespecially with a little help from a magnifier.   Sediment Grain Sizes The Wentworth scale was published in 1922 by Chester K. Wentworth, modifying an earlier scale by Johan A. Udden. Wentworths grades and sizes were later supplemented by William Krumbeins phi or logarithmic scale, which transforms the millimeter number by taking the negative of its logarithm in base 2 to yield simple whole numbers. The following is a simplified version of the much more detailed USGS version.   Millimeters Wentworth Grade Phi (ÃŽ ¦) Scale 256 Boulder –8 64 Cobble –6 4 Pebble –2 2 Granule –1 1 Very coarse sand 0 1/2 Coarse sand 1 1/4 Medium sand 2 1/8 Fine sand 3 1/16 Very fine sand 4 1/32 Coarse silt 5 1/64 Medium silt 6 1/128 Fine silt 7 1/256 Very fine silt 8 1/256 Clay 8 The size fraction larger than sand (granules, pebbles, cobbles. and boulders) is collectively called gravel, and the size fraction smaller than sand (silt and clay) is collectively called mud.   Clastic Sedimentary Rocks Sedimentary rocks form whenever these sediments are deposited and lithified and can be classified based on the size of their grains. Gravel forms coarse rocks with grains over 2 mm in size. If the fragments are rounded, they form conglomerate, and if they are angular, they form breccia.Sand, as you may guess, forms sandstone. Sandstone is medium-grained, meaning its fragments are between 1/16 mm and 2 mm.  Silt forms fine-grained siltstone, with fragments between 1/16 mm and 1/256 mm.  Anything less than 1/256 mm results in either claystone or mudstone. Two types of mudstone are shale and argillite, which is shale that has undergone very low-grade metamorphism.   Geologists determine grain sizes in the field using printed cards called comparators, which usually have a millimeter scale, phi scale, and angularity chart. They are especially useful for larger sediment grains.  In the laboratory, comparators are supplemented by standard sieves.

Amazon Self-Publishing Royalties Heres What You Need to Know

Amazon Self-Publishing Royalties Heres What You Need to Know Amazon Self-Publishing Royalties and Costs: Here's What You Need to Know If you’re reading this post, you’re probably already familiar with Kindle Direct Publishing (KDP), Amazon’s self-publishing service for indie authors. But you may be somewhat less familiar with the mechanics of Amazon self-publishing royalties: how much authors get paid, when they receive payments, and of course, how much Amazon takes out of those payments for things like printing/delivery costs.We’ll answer cover all these topics and more in our pithy primer on Amazon self-publishing costs and royalties! Let’s start with one of the most commonly asked questions, for KDP authors wondering when they can expect their share of profits. Everything you ever wanted to know about Amazon royalties! 🠤‘ When does Amazon pay royalties to authors? 🕑Amazon starts paying royalties 60 days after the first sale is made, with further payments coming through every month. Depending on where you do your banking, you can elect to be paid through direct deposit - also known as Electronic Fund Transfer (EFT) - wire transfer, or check. However, no matter which avenue you go down, there’s no way to receive your royalties any sooner than 60 days. So if you have bills to pay, make sure you’re not counting on your royalties coming in right away.In terms of which payment method is best for you, you should know that there’s no payment threshold for direct deposit. For check and wire payments, you’ll be paid only after you make a certain amount in royalties (for instance, $100 in USD and CAD and  £100 in the UK). See the full list of payment thresholds here.Now let’s talk about the program’s ebook and print royalty plans - which, as you can imagine , are pretty different from one another.How do ebook royalties work? 📠±Amazon offers two ebook royalty plans: the 70% option and the 35% option. To be eligible for the 70% plan, you’ll need to do all of the following:Publish something that’s not in the public domain.Price your ebook between $2.99 and $9.99. This price also needs to be at least 20% lower than the lowest list price for a print version.Pay for file delivery. This doesn’t require any extra effort on your part - the delivery fees are automatically deducted from your royalty payments.Keep in mind that only books sold to customers in certain countries are eligible for the 70% plan. Additional copies sold outside those territories will go on the 35%. Don’t worry, the 70%-eligible territories include all the big Anglophone markets - the US, UK, Canada, Australia, and New Zealand - in addition to several others, primarily in the EU. If you enroll in KDP Select, the list expands to include Brazil, India, Japan, and Mexico.How do print royalties work? 📘For those thinking about self-publishing a print book, Amazon offers two distribution tiers for self-published paperbacks. Each comes with its own royalty structure, and in both cases, the cost of printing the book is deducted from royalty payments.If you go through the regular Amazon-only distribution channels, you can expect 60% of the list price for every paperback sold. But if you distribute your book through Amazon’s Expanded Distribution plan to non-Amazon retailers, like Barnes Noble and Books-a-Million, you’ll be looking at 40% instead. (In lieu of opting into this plan, we recommend using IngramSpark for expanded distribution. You can read more about why here.)The cost of self-publishing on Amazon 💠°Unlike vanity presses, which make authors pay for publication, Amazon won’t charge you any money upfront to self-publish your book. Instead, delivery costs (for ebooks) and print ing costs (for paperbacks) are subtracted from your royalties. Let’s break the cost of Amazon self-publishing down below.What are the ebook delivery costs?If you’re on the 70% royalty plan, ebook delivery costs will be deducted from your royalty payments. They vary depending on the currency used. For instance, you’re looking at $0.15 per megabyte in USD and CAD, and  £0.10 per megabyte in GBP. This cost is waived if you select the 35% royalty plan - which may be a boon if you want to set a high price for your book anyway (as the 70% royalty plan requires it to be lower than $9.99).What are the paperback printing costs?As for the printing costs associated with self-published paperbacks, those depend on A) your book’s page count, and B) whether you choose to print in black-and-white or in full color. Don’t worry, you won’t have to figure this out yourself - Amazon calculates your printing cost and displays it for you as you’re uploa ding your book to the platform. It will also suggest a minimum list price to ensure that your book sells for enough to cover the cost of printing.Your printing cost is calculated according to the following formula (where fixed cost depends on your page count and ink type):Fixed cost + (page count x cost per individual page)You can find fixed costs in USD in the following table:Paperback specificationsFixed costAdditional cost per pageBlack ink with 24-108 pages$2.15 per bookNoneBlack ink with 110-828 pages$0.85 per book$0.012 per pageColor ink with 24-40 pages$3.65 per bookNoneColor ink with 42-500 pages$0.85 per book$0.07 per pageTo give you a sense of how the calculation works, Amazon would charge $4.45 per copy to print a 300-page paperback in black-and-white, because $0.85 + (300 x $0.012) = $4.45. You can read more about Amazon printing costs here.What about other costs?Of course, the print and delivery costs that come out of your royalties don’t include all the optional expenses you may incur if you want to put out a high-quality, professional-looking volume. The full suite of services like editing and cover design can set you back a couple thousand dollars. And that doesn’t even factor in marketing costs - which can include Facebook advertising, Amazon’s native ads, and any other external promotions you want to run.This doesn’t mean it’s impossible to save when self-publishing. For instance, while you may have had to pay for typesetting previously, apps like the Reedsy Book Editor allow you to format your book for free. There are also some book promotion services that will list your book free of charge, though keep in mind their submissions can be competitive. If you really want to cut costs, you can even self-edit and design your own cover, though we wouldn’t recommend this unless you already know a lot about design.At the end of the day, the best way to save on self-publishing is to stay informed. The more yo u know about the costs, royalties, and other aspects of various publishing plans, the more cost-effective (and generally effective!) your path will be. To that end, here are a few more resources you might want to check out:How Much Does It Cost to Self-Publish a Book in 2019?The 13 Best Self-Publishing Companies of 2019What Is the Best Service for Print on Demand Books?The Complete Guide to Ebook DistributionWe hope this post helped you understand Amazon self-publishing royalties and costs a little better! However, if you still have questions, leave them in the comments and we’ll answer to the best of our ability.