The most recent 541 million years of geologic time, including the present, represented by rocks that contain evident and abundant fossils
Atoms of the same element that have different numbers of neutrons
A type of conformity in which layered sedimentary rocks lie on an erosion surface cut into ingeous or metamorphic rock
A thin, widespread, easily recognized sedimentary layer that can be used for correlation because it was deposited rapidly and simultaneously over a wide area
A term describing sedimentary layers that were deposited continuously, without detectable interruption
An unconformity in which younger sediments or sedimentary rocks rest on the eroded surface of tilted or folded older rocks
The longest unit of geologic time that is divided into eras
The process of establishing the age relationship of rocks or geologic features from different locations on Earth, this can be done by comparing sedimentary characteristics of the layers or the types of fossils found in them
The age of a geologic event based on the number of years ago it occurred
An approach to determining the timing of geologic events based on the order in which they occurred, rather than on the absolute number of years ago in which they occurred
A geologic time unit that is divided into periods
Down
Referring to the absence of oxygen
Sheet-like body of plutonic igneous rock that forms when magma flows into a rock fracture
A type of unconformity in which the sedimentary layers above and below the unconformity are parallel
A chronological arrangement of geologic time subdivided into eons, eras, periods, epochs, and ages
The process of measuring the absolute age of rocks, minerals, and fossils by measuring the concentrations of radioactive isotopes and their decay products
A fossil that dates the layers where it is found because it came from an organism that is abundantly preserved in rocks, was widespread geographically, and existed as a species or genus for only a relatively short time.
A term referring to all of geologic time before the Paleozoic era, encompassing approximately the first 4 billion years, or roughly 90%, of Earth's history; also refers to all rocks formed during that time
A geologic time unit that is divided into ages
A boundary between layers of sediment or sedimentary rocks that represents an interruption that involves partial erosion of the older layer.
The rocks that currently exist on Earth and contain the record of its history.
The time it takes for half of the atoms of a radioactive isotope in a sample to decay
A geologice time unit that is divided into epochs
The shortest unit of geological time
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Where is my puzzle?
All your puzzles are accessible from your 'My Puzzles' page, which you can access using the navigation bar at the top when you are logged in.
Be sure to log in using the same email address you used when you created your puzzle.
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There is a 'Make Printable' button on the top left of your puzzle that will let you sign up for a plan or purchase a single puzzle.
Once paid, that button will turn into a 'Preview + Publish' button that will put your puzzle in a format that can be printed or solved online.
Once you publish your puzzle, you can click the print icon or use your browser’s print function.
It looks weird when printed.
First make sure you’ve published your puzzle. See the 'How do I print?' section above for more information.
99% of other printing issues have to do with printer settings. Instead of trying to fiddle with printer settings, which can be time-consuming and frustrating, there are a couple workarounds you can try.
You can try printing from a different browser, since different browsers have different default print settings. Alternately, you can try saving as a PDF (next to the print icon) and print that.
Why isn’t this free?
We invested in building a number of premium features that free sites are unable to offer: the ability to automatically or manually add words to your puzzle, save-as-you-go puzzle editing, the ability to access your puzzles from any computer, an uncluttered and ad-free interface, the ability for friends and colleagues to solve your puzzles online, and quick responsiveness to reported issues.
My Crossword Maker is the lowest-price service we've found that provides these features, and is designed for people who are not satisfied with what free sites are able to provide.
I thought this was free.
We’re sorry you thought My Crossword Maker was free, that must have been frustrating.
We’re constantly trying to provide a clear and straightforward user experience, and we’re not trying to hide the price: on the page where you make your puzzle, the price is listed in the overview in the top left (before you log in), below the 'Make Printable' button (after you log in), in the FAQ below the grid, and also in the tour.
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It says there is no account with my email.
First check whether you used a different email address to create your account. Your login email is the email address where you received a welcome email from us.
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I am being asked to pay a second time.
If you are a member of My Crossword Maker and are still being asked for payment, then you may have inadvertently created a second account.
Your paid account will have the email address where you received an email confirming your subscription.
If you never received such an email, or are still unable to find your paid account, report an issue below and provide the name and last four digits on the card you used when you signed up. We’ll use this information to track down your account.
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For security a human can’t see or reset your password, so read the below information carefully.
If you haven’t gotten the password reset email, check your spam folder, be sure you’re checking the email account that the email was sent to, and be aware that some school email systems block emails from non-school email addresses.
If you have the password reset email but the password isn’t accepted, be sure you are using the most recent password reset email: sometimes people will hit the button twice, and only the second password will work.
Be sure if you copy-paste the password not to get a space on the outside, or if you're typing it keep in mind that it's case-sensitive and that a lower-case L can look like the number 1, etc.
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Not all my words are in my puzzle.
When you hit the 'Arrange' button, our algorithm will try to arrange all your words on the grid, and will move words around to try to fit the most words.
This will get all the words on the grid about 90% of the time, depending on the word list. For the other 10%, you will get an alert explaining that the words that did not fit were added to the scratchpad.
It prints on two pages.
Big puzzles won’t always print on one page — the clues and grid are the smallest we could make them while keeping them readable for everyone.
That said, different browsers print in slightly different ways, so you could try using 'print preview' using a different browser (or try the PDF button) to see if you like how that looks better.
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We generally respond to all reported issues in about a day. If it’s been a few days and you haven’t heard back from us, it’s possible we sent an email that didn’t reach you.
Check your spam folder, and be aware that some school email systems block emails from non-school email addresses. Try providing a different email address if you think our emails to you are being blocked.
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