﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2023v5.1" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-11-15T18:28:26-08:00</ReturnTs>
    <TaxPeriodEndDt>2023-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmName>
        <BusinessNameLine1Txt>B Cheryl Leighton CPA</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>1715 E Hedgecroft Drive</AddressLine1Txt>
        <CityNm>EL Lago</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>77586</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>746067281</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>CORPUS CHRISTI GEOLOGICAL SOCIETY</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>CORP</BusinessNameControlTxt>
      <PhoneNum>3618848824</PhoneNum>
      <USAddress>
        <AddressLine1Txt>PO BOX 1068</AddressLine1Txt>
        <CityNm>CORPUS CHRISTI</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>78403</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>SEBASTIAN P WIEDMANN</PersonNm>
      <PersonTitleTxt>SEC/TREASURER</PersonTitleTxt>
      <PhoneNum>3618848824</PhoneNum>
      <SignatureDt>2024-05-07</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>B CHERYL MAYHEW</PreparerPersonNm>
      <PTIN>P01329157</PTIN>
      <PhoneNum>3615375949</PhoneNum>
      <PreparationDt>2024-11-15</PreparationDt>
      <SelfEmployedInd>X</SelfEmployedInd>
    </PreparerPersonGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2024-10-15 13:58:12Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="IRS990EZ-01" referenceDocumentId="IRS990ScheduleO-01">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>WWW.CCGEO.ORG</WebsiteAddressTxt>
      <Organization501cInd organization501cTypeTxt="6">X</Organization501cInd>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>42843</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>0</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>0</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>12485</MembershipDuesAmt>
      <InvestmentIncomeAmt>51</InvestmentIncomeAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>0</GainOrLossFromSaleOfAssetsAmt>
      <FundraisingGrossIncomeAmt fndrsngEventContriPrevRptAmt="26505" referenceDocumentId="IRS990ScheduleG-01" referenceDocumentName="IRS990ScheduleG">26505</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>22398</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>4107</SpecialEventsNetIncomeLossAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>0</GrossProfitLossSlsOfInvntryAmt>
      <OtherRevenueTotalAmt>3802</OtherRevenueTotalAmt>
      <TotalRevenueAmt>20445</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>6064</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>275</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>1125</OccupancyRentUtltsAndMaintAmt>
      <OtherExpensesTotalAmt>10668</OtherExpensesTotalAmt>
      <TotalExpensesAmt>18132</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>2313</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>8257</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>10570</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>8257</BOYAmt>
        <EOYAmt>10570</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>8257</BOYAmt>
        <EOYAmt>10570</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>8257</BOYAmt>
        <EOYAmt>10570</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>TO PROMOTE THE SCIENCE OF GEOLOGY, ESPECIALLY AS IT RELATES TO THE DEVELOPMENT OF OIL, GAS AND OTHER RESOURCES IN SOUTHWEST TEXAS</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>THE SOCIETY OFFERS INTRODUCTORY AND ADVANCE LEVEL COURSESIN THE SCIENCE OF GEOLOGY AND RELATED EARTH SCIENCESSEE SCHEDULE O</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>6064</GrantsAndAllocationsAmt>
      </ProgramSrvcAccomplishmentGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>DENNIS MOORE</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>FRANK CORNISH</PersonNm>
        <TitleTxt>COUNCILOR I</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>SEBASTIAN WIEDMANN</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>SEBASTIAN WIEDMANN</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JUAN CABASOS</PersonNm>
        <TitleTxt>VICE PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ROBERT SCHNEIDER</PersonNm>
        <TitleTxt>PAST PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>RICK PAGE</PersonNm>
        <TitleTxt>COUNCILOR II</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>CHARLES BENSON</PersonNm>
        <TitleTxt>VICE PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <InitiationFeesAndCapContriAmt>0</InitiationFeesAndCapContriAmt>
      <GrossReceiptsForPublicUseAmt>0</GrossReceiptsForPublicUseAmt>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>SEBASTIAN WIEDMANN</PersonNm>
        <USAddress>
          <AddressLine1Txt>PO BOX 1068</AddressLine1Txt>
          <CityNm>CORPUS CHRISTI</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>78403</ZIPCd>
        </USAddress>
        <PhoneNum>3618848824</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <Form720FiledInd>false</Form720FiledInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
    </IRS990EZ>
    <IRS990ScheduleG documentId="IRS990ScheduleG-01">
      <FundraisingEventInformationGrp>
        <Event1Nm>FISHING TOURNAMENT</Event1Nm>
        <GrossReceiptsEvent1Amt>26505</GrossReceiptsEvent1Amt>
        <GrossRevenueEvent1Amt>26505</GrossRevenueEvent1Amt>
        <OtherDirectExpensesEvent1Amt>22398</OtherDirectExpensesEvent1Amt>
        <GrossReceiptsTotalAmt>26505</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>26505</GrossRevenueTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>22398</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>22398</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>4107</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="IRS990ScheduleO-01" softwareId="23017509">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>PART III-PRIMARY EXEMPT PURPOSE - GEOLOGICAL PUBLICATIONS AND BULLETINS AND GEOLOGICAL THEMED TEE SHIRTS ARE MADE AVAILABLE TO THE PUBLIC TO PROMOTE PUBLIC AWARENESS OF GEOLOGY AND EARTH SCIENCES</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>PART I, LINE 7B, OTHER COSTS:</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>PART I, LINE 4, INTEREST INCOME - HISTORY FUND 51</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>PART I, LINE 10, CHARITABLE-GRANT NAME: CC GEOLOGICAL SOCIETY SCHOLARSHIP TRUST FUND, PO BOX 1068, CORPUS CHRISTI, TEXAS 78403-NO RELATIONSHIP-CASH-AMOUNT 6,064</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>SEE PART I,LINE 16 BELOW: SEMINAR LUNCH MEETINGS 5,600, OFFICE SUPPLIES 85,BANK SERVICE CHARGES 60, OPERATING EXPENSES 3,519 AND MISCELLANEOUS ADMIN EXPENSES 1,404</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>PART III-LINE 28: THE SOCIETY SOLICITS CONTRIBUTIONS FOR BENEFIT OF THE CORPUS CHRISTI GEOLOGICAL SCHOLARSHIP TRUST,WHICH PROVIDES MONEY SCHOLARSHIPS TO STUDENTS WHO ARE PURSUING THE MAJOR STUDY OF GEOLOGY IN COLLEGES AND UNIVERSITIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt V, Line 44d</FormAndLineReferenceDesc>
        <ExplanationTxt>No receipts and no need to file form 720</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>BULLETIN ADS 1510.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>BOOK SALES 321.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>MISCELLANEOUS 1971.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>SCHOLARSHIPS; CASH/CHARITABLE; CORPUS CHRISTI GEOLOGICAL SOCIETY: PO BOX 1068, CORPUS CHRISTI , TX, 78403; NONE, 6064.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>SALES TAX 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>SEMINAR LUNCH MEETINGS 5600.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>OFFICE SUPPLIES 85.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>SERVICE CHARGE 60.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>OPERATING EXPENSES 3519.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>MISCELLANEOUS 1404.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>